www.coria-cfd.fr - User contributions [en]

Archer

2015-10-26T16:23:18Z

Berlemont:

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Modified Rudman's method two grids
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:ite304.jpg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » RUDMAN-TYPE Technique with one grid
*Ugas=22.6m/s and Uliq=0.27m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=34.2mm (4mm+1.7mm)x6 that is 3 x the « jet +gas » diameter
*Grid: 256x256x256,(mesh is 134µm)
*512 procs on Curie, 12h wall-clock for 30000 time steps.
*Grid: 512x512x512
*Grid: 512x512x1024
*8192 procs on TURING, 16h wall clock for 6000 time steps.
*[[Media:TOUT_comp2.avi |Marmotte.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:im1000.jpg|right|thumb|150px|]]
</div>
*Same configuration
*Initial boundary layers included
*Grid:512x512x1024
*[[Media:With_bound_lay.avi‎ |Oct_15_2015.avi]]
*Helicoïdal behaviourin simulations (experimentally observed)
*[[Media:Tourne960.avi‎‎ |helicoid.avi]]

File:Tourne960.avi

2015-10-26T16:22:35Z

Berlemont:

Archer

2015-10-26T16:16:30Z

Berlemont:

Archer

2015-10-26T16:15:07Z

Berlemont:

File:With bound lay.avi

2015-10-26T16:14:21Z

Berlemont:

Archer

2015-10-26T16:10:04Z

Berlemont:

File:Im1000.jpg

2015-10-26T16:05:56Z

Berlemont:

Archer

2015-10-26T16:02:58Z

Berlemont:

Archer

2015-10-26T16:01:43Z

Berlemont:

Archer

2014-09-17T14:07:39Z

Berlemont: /* Air assisted atomization */

File:TOUT comp2.avi

2014-09-17T14:07:04Z

Berlemont:

Archer

2014-09-17T14:04:32Z

Berlemont: /* Air assisted atomization */

Archer

2014-04-30T09:05:45Z

Berlemont: /* Air assisted atomization */

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Modified Rudman's method two grids
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:ite304.jpg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » RUDMAN-TYPE Technique with one grid
*Ugas=22.6m/s and Uliq=0.27m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=34.2mm (4mm+1.7mm)x6 that is 3 x the « jet +gas » diameter
*Grid: 256x256x256,(mesh is 134µm)
*512 procs on Curie, 12h wall-clock for 30000 time steps.
*Simulation is 800000 time steps.
*[[Media:Ite56_469_10im.avi |Marmotte.avi]]

Archer

2014-04-30T09:05:25Z

Berlemont: /* Air assisted atomization */

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Modified Rudman's method two grids
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:ite304.jpg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » RUDMAN-TYPE Technique with one grid
*Ugas=22.6m/s and Uliq=0.27m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=34.2mm (4mm+1.7mm)x6 that is 3 x the « jet +gas » diameter
*Grid: 256x256x256,(mesh is 134µm)
*512 procs on Curie, 12h wall-clock for 30000 time steps.
*Simulation is 800000 time steps.
*[[Media:Ite56_469_10im_comp.avi |Marmotte.avi]]

File:Ite56 469 10im.avi

2014-04-30T09:05:04Z

Berlemont:

Archer

2014-04-29T15:35:58Z

Berlemont: /* Air assisted atomization */

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Modified Rudman's method two grids
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:ite304.jpg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » RUDMAN-TYPE Technique with one grid
*Ugas=22.6m/s and Uliq=0.27m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=34.2mm (4mm+1.7mm)x6 that is 3 x the « jet +gas » diameter
*Grid: 256x256x256,(mesh is 134µm)
*512 procs on Curie, 12h wall-clock for 30000 time steps.
*Simulation is 800000 time steps.
*[[Media:Ite56_469_5im_comp.avi |Marmotte.avi]]

Archer

2014-04-29T15:34:37Z

Berlemont: /* Air assisted atomization */

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Modified Rudman's method two grids
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:ite304.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » RUDMAN-TYPE Technique with one grid
*Ugas=22.6m/s and Uliq=0.27m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=34.2mm (4mm+1.7mm)x6 that is 3 x the « jet +gas » diameter
*Grid: 256x256x256,(mesh is 134µm)
*512 procs on Curie, 12h wall-clock for 30000 time steps.
*Simulation is 800000 time steps.
*[[Media:Ite56_469_5im_comp.avi |Marmotte.avi]]

File:Ite304.jpg

2014-04-29T15:32:50Z

Berlemont: uploaded a new version of "File:Ite304.jpg"

File:Ite304.jpg

2014-04-29T15:31:37Z

Berlemont: uploaded a new version of "File:Ite304.jpg"

Archer

2014-04-29T15:29:04Z

Berlemont: /* Air assisted atomization */

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Modified Rudman's method two grids
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:Ite304.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » RUDMAN-TYPE Technique with one grid
*Ugas=22.6m/s and Uliq=0.27m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=34.2mm (4mm+1.7mm)x6 that is 3 x the « jet +gas » diameter
*Grid: 256x256x256,(mesh is 134µm)
*512 procs on Curie, 12h wall-clock for 30000 time steps.
*Simulation is 800000 time steps.
*[[Media:Ite56_469_5im_comp.avi |Marmotte.avi]]

Archer

2014-04-29T15:28:08Z

Berlemont: /* Air assisted atomization */

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Modified Rudman's method two grids
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:ite304.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » RUDMAN-TYPE Technique with one grid
*Ugas=22.6m/s and Uliq=0.27m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=34.2mm (4mm+1.7mm)x6 that is 3 x the « jet +gas » diameter
*Grid: 256x256x256,(mesh is 134µm)
*512 procs on Curie, 12h wall-clock for 30000 time steps.
*Simulation is 800000 time steps.
*[[Media:Ite56_469_5im_comp.avi |Marmotte.avi]]

File:Ite304.jpg

2014-04-29T15:27:40Z

Berlemont:

File:Ite56 469 5im comp.avi

2014-04-29T15:24:31Z

Berlemont:

Archer

2014-04-29T15:14:18Z

Berlemont: /* Air assisted atomization */

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Modified Rudman's method two grids
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » RUDMAN-TYPE Technique with one grid
*Ugas=22.6m/s and Uliq=0.27m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=34.2mm (4mm+1.7mm)x6 that is 3 x the « jet +gas » diameter
*Grid: 256x256x256,(mesh is 134µm)
*512 procs on Curie, 12h wall-clock for 30000 time steps.
*Simulation is 800000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

Archer

2014-04-29T15:14:04Z

Berlemont:

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Modified Rudman's method two grids
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » RUDMAN-TYPE Technique with one grid
*Ugas=22.6m/s and Uliq=0.27m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=34.2mm (4mm+1.7mm)x6 that is 3 x the « jet +gas » diameter
*Grid: 256x256x256,(mesh is 134µm)
*512 procs on Curie, 12h wall-clock for 30000 time steps.
*Simulation is 800000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

Archer

2014-04-29T15:05:36Z

Berlemont: /* Air assisted atomization */

Archer

2014-04-29T15:04:42Z

Berlemont: /* 2D gas/liquid shear layer */

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Méthode Rudman deux grilles
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

Archer

2014-04-29T15:04:29Z

Berlemont: /* 2D gas/liquid shear layer */

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Méthode Rudman deux grilles
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

Rudman's style method with one grid

Archer

2014-04-29T15:02:31Z

Berlemont: /* Air assisted atomization */

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant » Méthode Rudman deux grilles
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*1024 procs on Curie, 12h wall-clock for 5000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
[[File:9_11.jpeg|right|thumb|300px|]]
</div>
*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

Archer

2013-11-21T16:54:11Z

Berlemont: /* GALLERY */

[[File:Archer.png]]

== OBJECTIVE: Liquid/Gaz Interface Simulations ==

<div class="infobox floatright" style="width: 500px;">
[[File:Imag1.png|right|thumb|300px|]]
</div>

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Describe the interface motion precisely
! [[File:fleche_vert.png|50 px]]
! Level Set Method
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Handle jump conditions at the interface
! without artificial smoothing
! [[File:fleche_vert.png|50 px]]
! Ghost Fluid Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Respect mass conservation
! [[File:fleche_vert.png|50 px]]
! VOF Method
|-
|}

{| border="0" cellspacing="0" cellpadding="2" align="left"
! Solve incompressible Navier Stokes equations
! [[File:fleche_vert.png|50 px]]
! Projection Method
|-
|}

[[File:fleche_roueg.png|50 px]] '''Archer is a 3D incompressible Navier Stokes solver with Level Set-Ghost Fluid-VOF coupling and MPI parallelization'''

== NUMERICS ==

* Cartesian mesh
* Mac grid (velocities on cell boundaries)
* WENO 5 scheme for convective terms, Adams Bashforth or RK3 or split algorithm in time
* Multigrid algorith for preconditionning Conjugate Gradient Method in Poisson equation solver
* Ghost Fluid method for variable discontinuities at the interface
* CLSVOF for mass conservation

*MPI parallelization

== UNDER DEVELOPMENT ==

* Immersed boundaries
* Adaptive mesh refinement
* Coupling with Lagrangian solver
* '''New convection scheme (modified Rudman's method)'''

== GALLERY ==

=== Turbulent jet ===
<div class="infobox floatright" style="width: 500px;">
[[File:jet_2048.jpg|right|thumb|300px|]]
</div>

Diesel type Jet Atomization :
Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1,
<math>\rho_{liq}</math>=696 kgm-3, <math>\rho_{gas}</math>=25 kgm-3

<math>\mu_{liq}</math> =1.210-3kgm-1s-1, <math>\mu_{gas}</math>=10-5kgm-1s-1, <math>\sigma</math>=0.06Nm-1
Numerical simulation by coupling Level Set / VOF / Ghost fluid methods

Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
*[[Media:Jet_Fin.avi|Jet.avi]]

=== Triple disk injector ===
<div class="infobox floatright" style="width: 500px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Mesh_intern_LES.png|center|thumb|Mesh for internal flow LES simulations|150px|]]
|[[File:Velocity.png|center|thumb|150px|]]
|[[File:triple.png|center|thumb|150px|]]
|}

</div>
*Coupling between internal flow simulations and DNS of primary breakup
*Radius of the jet exit: 90 microns
*Mesh 256x1024x1024 (~270 millions) dx~1.44 micron
*~3000 nodes on the (half) jet exit
*2048 procs
*[[Media:toto.avi|Triple.avi]]

=== Liquid/Gas mixing layer ===
<div class="infobox floatright" style="width: 680px;">
{| class="wikitable" style="margin: 1em auto 1em auto;"
|[[File:Couche1.png|center|thumb||100px|]]
|[[File:couche2.png|center|thumb|150px|]]
|[[File:nappe.png|center|thumb|150px|]]
|}

</div>
*Air/water mixing layer
*30m/s in air, 0.3 in water
*Grid is 512x512x1024 nodes
*Mesh size equals 48 µm.
*2048 procs, 20 hours for 3500 time steps; Simulation on 70000 time steps, dt~=10-6 s

*[[Media:shear.avi|Shear.avi]]

=== Air assisted atomization ===
<div class="infobox floatright" style="width: 500px;">
[[File:0193.jpeg|right|thumb|150px|]]
</div>

*Air/water Jet « Marmottant »
*Ugas=35m/s and Uliq=0.2m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=45.6mm (4mm+1.7mm)x8 that is 4 the « jet +gas » diameter
*Grid: 256x256x256,(512x512x512 for level set and VOF, mesh is 90µm)
*4096 procs on Curie, 12h wall-clock for 25000 time steps.
*Simulation is 250000 time steps.
*[[Media:Anim1 294 crop.avi |Marmotte.avi]]

=== 2D gas/liquid shear layer ===
<div class="infobox floatright" style="width: 500px;">
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*M=<math>\rho_{gas}</math><math>U_{gas}</math>^2 / <math>\rho_{liq}</math><math>U_{liq}</math>^2 = 16
*Ugas=30 m/s Uliq=0.26 m/s
*<math>\rho_{gas}</math>=1,2 kg/m3 <math>\rho_{liq}</math> =1000 kg/m3
*Lx=80mm, Ly=40 mm 10mm water + 10mm air + 20mm quiet
*Grid: 1024x512(that is 2048x1024 level set and VOF, mesh is 40 µm)
*512 procs on Curie
*18h wall clock for 100000 time steps.
*Simulation on 2 000 000 time steps
*[[Media:Ite1_20_1sur10_25im.avi|2Dliquid_shear_layer.avi]]

File:Ite1 20 1sur10 25im.avi

2013-11-21T16:53:25Z

Berlemont:

File:9 11.jpeg

2013-11-21T16:50:22Z

Berlemont:

Archer

2013-11-21T16:35:26Z

Berlemont: /* GALLERY */

File:Anim1 294 crop.avi

2013-11-21T16:34:35Z

Berlemont:

File:Ite1 19.avi

2013-11-21T16:30:35Z

Berlemont:

Archer

2013-11-21T16:28:54Z

Berlemont: /* Air assisted atomization */

File:0193.jpeg

2013-11-21T16:25:54Z

Berlemont:

Archer

2013-11-21T16:24:18Z

Berlemont: /* GALLERY */

Archer

2013-11-21T16:06:23Z

Berlemont: /* UNDER DEVELOPMENT */

Archer

2013-11-21T11:14:03Z

Berlemont: /* UNDER DEVELOPMENT */

Archer

2012-10-04T07:34:40Z

Berlemont:

Archer

2012-10-04T07:34:01Z

Berlemont:

File:Shear.avi

2012-10-04T07:32:06Z

Berlemont: uploaded a new version of "File:Shear.avi"

retest size

Archer

2012-09-18T12:19:15Z

Berlemont:

Archer

2012-09-17T10:08:41Z

Berlemont:

Archer

2012-09-17T10:07:24Z

Berlemont:

Archer

2012-09-07T16:02:08Z

Berlemont:

Archer

2012-09-07T15:58:39Z

Berlemont:

File:Couche1.png

2012-09-07T15:55:57Z

Berlemont: uploaded a new version of "File:Couche1.png"

Archer

2012-09-07T15:53:43Z

Berlemont: