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-   -   periodic and transient flow (http://www.cfd-online.com/Forums/fluent/44066-periodic-transient-flow.html)

Somchai March 10, 2007 10:42

periodic and transient flow
 
Hi

I try to simulate unsteady flow in a channel with ribs. I would like to use periodic boundary condition for reduced computatioal domain, but in the fluent mannual said that

"Note that transient simulations for fully-developed fluid flow are not valid with translational periodic flow"

Can I use periodic condition with unsteady simulation?

Plase tell me :-}

Thanks


Ning March 26, 2007 13:06

Re: periodic and transient flow
 
what says in fluent manual is wrong. check out a paper published by sung-eun kim named "an implicit fractional-step method for efficient transient simulation of incompressible flows". In it, he applied periodic bc to solve fully developed turbulent flow in a channel using les/nita.

Ning

somchai March 26, 2007 22:37

Re: periodic and transient flow
 
thank you very much


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