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2020-04-20T18:26:38Z

Pouxa: Created page with " === Turbulent jet === <div class="infobox floatright" style="width: 500px;"> 300px| </div> Diesel type Jet Atomization : Diameter: 100..."

=== 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]]

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