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August 16, 2011, 16:27 |
bounding velocity
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#1 |
Member
Farshad
Join Date: Oct 2010
Posts: 76
Rep Power: 15 |
Hi,
I want to bound my velocity by the following commands: volScalarField ux=U.component(0); volScalarField uy=U.component(1); volScalarField uz=U.component(2); ux.max(5); uy.max(10); uz.max(0); but when i monitor min/max of my velocity i see: (18.58 27.6014 2.57e-15) please tell me why openfoam does not obey my codes! Kind Regards, Farshad |
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August 17, 2011, 05:48 |
problem remains
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#3 |
Member
Farshad
Join Date: Oct 2010
Posts: 76
Rep Power: 15 |
Hi,
Thanks for the code but velocity is still too high at some points inside domain and my problem still remains. Thanks, Farshad |
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August 27, 2011, 08:54 |
bounding problem
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#5 |
Member
Farshad
Join Date: Oct 2010
Posts: 76
Rep Power: 15 |
Dear Nima,
I put the code in many places to see if it works but the maximum velocity is still 18 that shoud be 9m/s . If i dont extend the bounded region i would have the continuity problem and it does not converge. The interesting thing is if i solve energy equation coupled with momentum equation i get less continuity problems.(maybe because of huge grad(p) in momentum equation) Thanks, Farshad |
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August 29, 2011, 17:01 |
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#6 |
Senior Member
Nima Samkhaniani
Join Date: Sep 2009
Location: Tehran, Iran
Posts: 1,266
Blog Entries: 1
Rep Power: 24 |
hi dear farshad
its some how sensible! when you bound the velocity!!! you will encounter continuity problem!!! if you want to reduce maximum velocity maybe you need change ur boundary condition, ur initial condition, even ur mesh size and ur mesh type! |
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