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September 20, 2011, 11:27 |
pisoFoam fails with locDynOneEqEddy
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#1 |
Member
Join Date: May 2009
Posts: 54
Rep Power: 17 |
pisoFoam crashes when I try to use the locDynOneEqEddy LES model.
libOpenFOAM.so and libincompressibleRASModels.so both show up in the attached log. When I run the case with say dynSmagorinsky, everything works fine. in my constant/LESProperties: *************************************** LESModel locDynOneEqEddy delta cubeRootVol; locDynOneEqEddyCoeffs { ce 1.05; filter simple; } **************************************** I have no issues with this turb model in a channel flow problem with both pisoFoam and channelFoam. I have checked the initial conditions several times but I cannot find anything that could be responsible for crash in this case. Any hints are appreciated. |
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December 29, 2011, 19:42 |
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#2 |
Senior Member
Tarak
Join Date: Aug 2010
Location: State College, PA
Posts: 111
Rep Power: 16 |
Hii,
You can try to solve this in 2 ways: 1. In the wall boundary condition for turbulent kinetic energy, give a very small value e.g 1e-20 instead of 0. OR 2. Start solution using oneEqEddy or dynOneEqEddy model (or any other simpler model) and after some hundreds of iterations switch to locDynOneEqEddy model. Thanks, Tarak |
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March 17, 2014, 11:32 |
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#3 |
Member
Join Date: Feb 2014
Posts: 57
Rep Power: 12 |
Hi Tarak,
Your response for gfilip's question interested me alot. May you give me more details of switching to locDynOneEqEddy model after hundreds of iterations? More generally, I am searching how to initialize a LES simulation from a known solution? Thank in advance, VUT |
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