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GARCFD @garcfd

freelance CFD support, project work and solver development

Joined June 2014
  • Tweets 1,812
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  • Followers 2,674
1,159 Photos and videos
GARCFD@garcfd
Jun 11
Re-run of #Mach5 generic supersonic missile case with 2x larger domain, finer mesh, and refined wake region. Case was ran in @dicehub on 4procs, mesh 680k cells in #rhoSimpleFoam, giving good/better convergence.
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GARCFD@garcfd
Jun 10
ran generic supersonic missile at Mach 5 in #openfoam (#rhoSimpleFoam) in OF12 on @dicehub for 1000 its. Proper mesh with 3 layers, convergence bit wobbly after 600 its, maybe because of the freestream outer boundary.
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GARCFD@garcfd
Jun 10
image converted to STL geometry (copilot-3d) and ran at Mach 5 in #UFOCFD octree
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I didn't realise #SHM was so good at layer mesh - after meshing, all the setup was done with #opencode
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having the right settings for layer mesh in #snappyhexmesh makes all the difference...
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trying to generate layermesh using extrudeMesh...
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some commands are too complicated mergeMeshes -case ./simpleFoam-car3 -addCases ("./simpleFoam-car4")
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#UFOCFD octree solver - 9 min run time on laptop
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Going back to basics with the octree version of my #UFOCFD solver. This case is 425k leaf cells, and ran 10k iterations in 9 minutes on my laptop (using 4 procs). Its a compressible flow solver, but I made some pressure correction mods to allow it to run incompressible.
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GARCFD@garcfd
May 29
python octree mesher written with #opencode github.com/garcfd/python-oct…
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GARCFD@garcfd
May 11
Using #opencode I have updated the bouncing-bomb model to include the hydrodynamic forces (lift and drag) on the cylinder, instead of the spring analogy. Here we use representative values for all parameters. I have excluded rotational effects for now. github.com/garcfd/python-dam…
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GARCFD@garcfd
May 11
#UFOLBM with 'experimental' free-slip wall boundary condition - this case ran in 2 hours on @runpod A40 GPU, 96 million cells, 100k iterations.
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GARCFD@garcfd
May 10
#UFOLBM with free-slip wall boundary @runpod A40 GPU
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its amazing what you can do with #opencode - it has just written a water bounce simulater, and included a readme with the explanation of physcis: github.com/garcfd/python-bou…
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Been dusting off the #UFOLBM solver to check it still works/runs. This case took about 4.5 hours on @runpod single A40 GPU. The mesh is 96 million cells. Here using the bounce-back wall boundary condition, hence the over-separation. Nice car geometry from thingiverse.com/thing:688425…
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I ran this case in the OF12 #incompressibleFluid solver. It was an interesting experience because I used #opencode to set up the entire case from scratch starting from just the STL file. It took much longer than normal, because of having to feed error messages back into the GUI.
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it looks like even #Grok can do aerodynamics now - so is there any need for CFD engineers?
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#python ball bounce on water using #opencode
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