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May 11, 2014, 16:07 |
MappedField BC for Velocity in LES
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#1 |
Senior Member
Bobby
Join Date: Oct 2012
Location: Michigan
Posts: 454
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Greetings All
I am trying to set a mappedField B.C. for my fuel inlet according to this tutorial: $FOAM_TUTORIALS/incompressible/pisofoam/les/pitzDailyMapped In the blockMeshDict file of this tutorial we have: inlet { type mappedPatch; offset ( 0.0495 0 0 ); sampleRegion region0; sampleMode nearestCell; samplePatch none; faces ( (0 22 23 1) (1 23 24 2) (2 24 25 3) ); } My question is what is this offset? and how should I set it? Cause I did the same as this tutorial for my LES case and I got this error: Code:
Selecting turbulence model type LESModel Selecting LES turbulence model Smagorinsky --> FOAM FATAL ERROR: Case is not 3D or 2D, LES is not applicable From function cubeRootVolDelta::calcDelta() in file cubeRootVolDelta/cubeRootVolDelta.C at line 72. FOAM exiting A short question: Do I need to modify other 0 folder files (except velocity) for setting this B.C.? Any hint is appreciated. Regards Bobi |
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May 13, 2014, 09:29 |
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#2 |
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Nima Samkhaniani
Join Date: Sep 2009
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Dear Bobi
1- does your case run with out another BC? 2- mappedPatch BC maps field from inside domain to patch, the offset here shows the distance from the region (those sample faces you mentioned)
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May 13, 2014, 10:21 |
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#3 |
Senior Member
Bobby
Join Date: Oct 2012
Location: Michigan
Posts: 454
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Greetings Nima
There was a problem with my mesh that reported the mentioned error. I solved it. However, I was still wandering about offset parameter. Have you ever tried to investigate this parameter? I mean how far this spatial point should be from the injection plane? ( my origin plane)? Can we correlate it with injection radius of fuel flow in domain ? Regards Bobi |
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May 13, 2014, 12:27 |
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#4 |
Senior Member
Nima Samkhaniani
Join Date: Sep 2009
Location: Tehran, Iran
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i have no idea, i feel it depends on your simulation and it varies from one simulation to other
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