Difference between revisions of "Archer Gallery"
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Revision as of 19:31, 20 April 2020
Contents
Atomisation
Turbulent jet
Diesel type Jet Atomization : Diameter: 100µm, Liquid velocity 100 ms-1, Turbulence 5%, gas velocity: 0 ms-1, =696 kgm-3, =25 kgm-3
=1.210-3kgm-1s-1, =10-5kgm-1s-1, =0.06Nm-1 Numerical simulation by coupling Level Set / VOF / Ghost fluid methods
Mesh : 256x256x2048 (130 millions points) MPI parallelization 128 procs.
Triple disk injector
- 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
- Triple.avi
Liquid/Gas mixing layer
- 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
Air assisted atomization
- Air/water Jet « Marmottant » Modified Rudman's method two grids
- Ugas=35m/s and Uliq=0.2m/s
- =1,2 kg/m3 =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.
- Marmotte.avi
2D gas/liquid shear layer
- M=^2 / ^2 = 16
- Ugas=30 m/s Uliq=0.26 m/s
- =1,2 kg/m3 =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
- 2Dliquid_shear_layer.avi
Air assisted atomization
- Air/water Jet « Marmottant » RUDMAN-TYPE Technique with one grid
- Ugas=22.6m/s and Uliq=0.27m/s
- =1,2 kg/m3 =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.
- Marmotte.avi
Air assisted atomization
- Same configuration
- Initial boundary layers included
- Grid:512x512x1024
- Oct_15_2015.avi
- Helicoïdal behaviourin simulations (experimentally observed)
- helicoid.avi