# set the pressure on a whole subdomain

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 May 18, 2006, 03:00 set the pressure on a whole subdomain #1 nicolas Guest   Posts: n/a Hi. It's the first time I am working on CFX. I am using CFX 5.7.1 I want to set the value of the pressure and the temperature on a whole subdomain. These value are in .csv file How can I make to do that? The main problem for me, is: how to set the pressure and the temperature on a subdomain? Thanks, Nicolas

 May 18, 2006, 08:54 Re: set the pressure on a whole subdomain #2 Mike Guest   Posts: n/a You can add a source term and source coefficient to the energy equation in the subdomain to maintain a fixed temperature. For example, use the follow expressions: LIBRARY: CEL: EXPRESSIONS: Scoeff = -1000000 [W m^-3 K^-1] Sterm = Scoeff * (T - 325 [K]) END END END Scoeff is just any big number; the bigger it gets, the stronger the correction source will become. Pressure is part of the solution and there is no such thing as a pressure source term, so you cannot control pressure in a similar way. Mike

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