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Question about boundary condition setting for a specific case |
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July 26, 2012, 16:30 |
Question about boundary condition setting for a specific case
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#1 |
Senior Member
lnk
Join Date: Feb 2011
Location: Switzerland
Posts: 118
Rep Power: 15 |
Hi everyone,
Thanks for your time to look at this email. I'm working on the CFD of a pipe. My work is to know the pressure drop of a section of it by CFX. I only know the inlet velocity of that section. May I ask what boundary condition should I set to the outlet surface? Since there's pressure drop, should I still set the outlet boundary condition to 'relative pressure = 1' as to the other places? I'm looking forward to your answer. Best regards and many thanks, lnk |
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July 26, 2012, 16:57 |
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#2 |
Member
Felipe Gobbi
Join Date: Apr 2012
Location: Brazil
Posts: 76
Rep Power: 13 |
I believe this relative pressure is related to the reference you set at the Default Domain.
Have you tried the Relative Pressure = 0? You need a lower value at the outlet so the flow can occur as far as I know, but correct me if I'm wrong. What you can do is mess a little bit with the conditions and always monitor the pressure at the outlet using CFD-Post tables to see if it's coherent to the reality... ave(Pressure)@Outlet should do the job. The pipe walls should be no slip ones right? Good luck. |
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