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Difference between wall and patch boundaries for inviscid flow

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Old   April 26, 2017, 05:50
Default Difference between wall and patch boundaries for inviscid flow
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Jim
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Hi,

Is there a difference between the wall and patch boundaries when considering inviscid flow (i.e. mu=0, slip at walls for velocity, no turbulence model)? Would I be right to say that the wall and patch types have the same effect under these conditions?

To test this I ran the pitzDaily case using rhoPimpleFoam, with mu=0, slip at the "wall" for velocity, and no turbulence model. This was ran separately with patch and wall boundaries for the "wall". I could not see any difference between the two, where comparing the pressure and velocity contours. However, I am not sure whether this will be the case in other scenarios.

Thanks
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Old   April 26, 2017, 06:18
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Uwe Pilz
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You need the wall boundary only if you want to use wall functions.
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Old   April 26, 2017, 06:23
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Quote:
Originally Posted by piu58 View Post
You need the wall boundary only if you want to use wall functions.
Thanks, I understand your point. I am still curious as to whether the wall and patch boundaries are essentially equivalent for inviscid flow?
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