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December 29, 2011, 12:42 |
Yes-No question about poiseuille flow
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#1 |
Member
Amin Shariat KHah
Join Date: Apr 2011
Location: Shiraz
Posts: 86
Rep Power: 15 |
Dear Foamers,
I have read every posts about pressure driven flow but finally I need some one only tell me is it right my conclusion about pressure boundary condition in poiseuille flow, or not: if we have a pressure driven flow and we don't know about velocity but we know pressure boundary condition, we use velocity (U/0) in this form: inlet : type pressureInletVelocity value uniform(0 0 0 ) ; outlet: type zerogradient and pressure as below: inlet: type fixedValue; value uniform 1; (we assume 1 is value of pressure at inlet) outlet type fixedValue; value uniform 0; And another queation, is this pressure value, real or divided by density? |
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December 29, 2011, 13:37 |
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#3 |
Member
Amin Shariat KHah
Join Date: Apr 2011
Location: Shiraz
Posts: 86
Rep Power: 15 |
Dear Nmia
Thanks very much dadash Is the boundary conditions right? |
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December 29, 2011, 15:33 |
Fan boundary Condition
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#5 |
Member
Amin Shariat KHah
Join Date: Apr 2011
Location: Shiraz
Posts: 86
Rep Power: 15 |
I've heard about some boundary condition which name is FAN ,
any body know different between fan and pressureInletVelocity? Is it possible to use it in poiseulle flow? |
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January 1, 2012, 06:38 |
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#6 |
Senior Member
Nima Samkhaniani
Join Date: Sep 2009
Location: Tehran, Iran
Posts: 1,267
Blog Entries: 1
Rep Power: 25 |
fan is periodic boundary condition with a pressure difference between to cyclic face,
i suggest you to look at channelIcoFoam, if you want to cyclic boundary condition, however you can use Fan for pressure driven flow! |
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January 2, 2012, 13:31 |
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#7 |
Member
Amin Shariat KHah
Join Date: Apr 2011
Location: Shiraz
Posts: 86
Rep Power: 15 |
Thanks Dear Nima,
have you any idea about it that how can I understand what OpenFoam Code do, when we use one of any boundary conditions? |
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January 2, 2012, 14:24 |
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#8 |
Senior Member
Nima Samkhaniani
Join Date: Sep 2009
Location: Tehran, Iran
Posts: 1,267
Blog Entries: 1
Rep Power: 25 |
1) there is a little description about each code in .C files, you can look at it
2) search in forum about solver 3) look at OpenWiki 4)chalmarse university maybe you find some extra tutorials |
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January 10, 2012, 07:10 |
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#9 |
Member
Amin Shariat KHah
Join Date: Apr 2011
Location: Shiraz
Posts: 86
Rep Power: 15 |
Thanks very much Dear Nima
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Tags |
boundary condition, poiseuille flow, pressure driven |
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