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October 29, 2009, 12:37 |
Confused with wall boundaries in 3D
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#1 |
Member
Dennis Rown
Join Date: Oct 2009
Posts: 51
Rep Power: 17 |
Hello!
I am modelling a cube with gas inside. Two sides of the cube have to be holes while the other four sides have to be walls. I have a patch for the holes and one for the walls. In the blockMeshDict they're: patch sides ( (1 2 6 5) (0 4 7 3) ) wall walls ( (0 1 5 4) (5 6 7 4) (3 7 6 2) (0 3 2 1) ) And in the 0/p they're: boundaryField { sides { type zeroGradient; } walls { type zeroGradient; } } Is this a false setting for walls to be walls and sides to be holes? |
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October 29, 2009, 14:23 |
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#2 |
Member
Bjorn H. Hjertager
Join Date: Mar 2009
Posts: 72
Rep Power: 17 |
Your wall BC seems OK. The holes are either inlets or outlets. If inlet zeroGradient is OK for pressure in addition you need a fixedValue for the normal velocity. If outlet the pressure should be a fixedValue.
rgds Bjorn |
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October 30, 2009, 05:49 |
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#3 |
Member
Dennis Rown
Join Date: Oct 2009
Posts: 51
Rep Power: 17 |
Thanks a lot! And for T is the same? And for U? I did it this way:
T) boundaryField { outlet { type fixedValue; value uniform 300; } walls { type zeroGradient; } } U) outlet { type fixedValue; value uniform (0 0 0); } walls { type fixedValue; value uniform (0 0 0); } |
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