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February 9, 2011, 17:53 |
Reference Pressure Information
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#1 |
Senior Member
Ugly Kid Joe
Join Date: Aug 2010
Posts: 193
Rep Power: 15 |
I am trying to simulate a flow over cylinder in CFX. In default domain I mention the Reference Pr. to be 1 [atm] and Relative Pressure to be 0 [Pa] in global initialization. Inspite of this I get the following message in the .OUT file.
+--------------------------------------------------------------------+ | Reference Pressure Information | +--------------------------------------------------------------------+ Domain Group: Default Domain Pressure has not been set at any boundary conditions. The pressure will be set to 0.00000E+00 at the following location: Domain : Default Domain Node : 1 (equation 1) Coordinates : ( 0.00000E+00, 1.95356E+00, 0.00000E+00). My domain is a simple rectangular region with a cylinder at the center. My BC are as follows: Inlet: Velocity u=0.5 m/s, v=0 & w=0 Outlet: Velocity u=0.5 m/s, v=0 & w=0 The rest of the side is Symmetric BC. Any kind of help is greatly appreciated. |
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February 9, 2011, 18:23 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
You should make the exit a pressure outlet, set to 0Pa. Your current boundaries are not well defined - you have not set the pressure level (but you knew that from the error message!)
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February 9, 2011, 18:29 |
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#3 |
Senior Member
Ugly Kid Joe
Join Date: Aug 2010
Posts: 193
Rep Power: 15 |
Even if I give constant velocity outlet, my Solution runs and also converges properly............... I really did not pay much attention to this error. However wats the problem if I give the outlet as constant mass flow rate or constant velocity ???
Thanks |
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