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-   -   boundary condition inlet equal outlet (https://www.cfd-online.com/Forums/fluent/65866-boundary-condition-inlet-equal-outlet.html)

 jpinho June 29, 2009 08:23

boundary condition inlet equal outlet

hello everyone,

i would like to know it it is possible to define a boundary condition as pressure outlet which will be the velocity inlet condition.

Basically both boundaries are exactly the same. this would be interesting to simulate closed circuits.

any suggestion?

thanks
jpinho

 nstar June 29, 2009 09:57

I was thinking exactly the same thing but never got chance to try it. I doubt it's gonna work. Please tell me more when you find something interesting.

 Rami July 1, 2009 08:58

If correctly understood, you are describing a periodic BC.

 jpinho July 1, 2009 09:34

rami,

thanks for your reply.. not exactly.. i was thinking to simulate a complete closed cycle.. like a thermodynamic one rankine or joule-brighton..

my question is.. if i have a closed geometry how can i set up boundary conditions for the flow?

kind regards
jpinho

 nstar July 1, 2009 09:50

I guess you will have to cut a thin slice out of the domain.
Quote:
 Originally Posted by jpinho (Post 221081) rami, thanks for your reply.. not exactly.. i was thinking to simulate a complete closed cycle.. like a thermodynamic one rankine or joule-brighton.. my question is.. if i have a closed geometry how can i set up boundary conditions for the flow? kind regards jpinho

 jpinho July 1, 2009 10:19

ok.. i agree..

and what about the boundary conditions??
how can you set that the inlet and outlet are the same boundaries??

(this was my initial question...)

jpinho

 nstar July 2, 2009 10:09

UDF? idk either

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