Ex#3 - Integrated Quantity Boundary Conditions

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 July 2, 2003, 12:07 Ex#3 - Integrated Quantity Boundary Conditions #1 Vinicius Guest   Posts: n/a Sponsored Links Hi everybody! I´m a CFX beginner and I have a model quite similar to the example 3 shown in user function examples at printable books. But it doesn´t clarify my questions on how to get fluid properties like temperature and density from a position (outlet Boundary Condition) and insert it into another position. I mean, I got a room wich is been cooled (transient) so I need to get an average temperature at the outlet surface and give it as a temperature at the inlet boundary condition. So the fluid goes out from domain, after that is cooled and return to domain. Does anyone know how to build that subroutine shown in that example? How can I do it without using User Function? What is the best choice to me? Thanks!

 July 2, 2003, 12:47 Re: Ex#3 - Integrated Quantity Boundary Conditions #2 Robin Guest   Posts: n/a Hi Vinicius, You can make your inlet a function of your outlet by adding the appropriate integral CEL function. For instance, if you want the inlet temperature to be 10 percent lower than the mass averaged temperature at an outlet boundary named "Exit", simply use the following expression for the inlet temperature: massFlowAve(T)@Exit * 0.10 Regards, Robin

 July 2, 2003, 15:44 Re: Ex#3 - Integrated Quantity Boundary Conditions #3 Vinicius Guest   Posts: n/a Thanks a lot Robin!! I´ll try it! Best regards Vinicius

 July 3, 2003, 12:38 Re: Ex#3 - Integrated Quantity Boundary Conditions #4 Lucio Guest   Posts: n/a Hi Robin, This function is very interesting! Where can I get more informations about this kind of functions? Did we have this in the CFX Printable books? Regards, Lucio

 July 4, 2003, 00:09 Re: Ex#3 - Integrated Quantity Boundary Conditions #5 Neale Guest   Posts: n/a Yes, look in the documentation for the CFX Expression Language. It covers all the integrated quantity functions available in the flow solver and CFX-Post. Neale

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