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How is a fixedValue BC extrapolated to first cell? |
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#1 |
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Join Date: Sep 2015
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Hi all,
I'm running a very simple case with simpleFoam (kEpsilon), where I have a rough wall patch. For this patch I choose to use the 'noSlip' BC for velocity which turns out to be a wrapper for fixedValue with value (0 0 0). 1) How is this fixed velocity at the wall extrapolated to the first cell? (Or where can I see how the extraploation is treated/defined?) 2) Other question - In my case I have roughness elements of length ~ 0.5 x dimension of the first cell. Is there a BC type where I can account for the effect on the velocity due to the roughness of the wall Thank you! Chris |
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#2 |
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What I mean with 'extrapolate' is, how it affects the first cells value...
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#3 | |
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Ok, if I'm not much mistaken, this is done through the nut*RoughWallFunction? |
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#4 | ||
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Quote:
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Tags |
boundary condition, rough wall, velocity bc |
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