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-   -   inlet with OUTFLOW (http://www.cfd-online.com/Forums/fluent/28413-inlet-outflow.html)

Máté Lohász April 5, 2001 04:15

inlet with OUTFLOW
 
What are you thinking about a outflow BC as inlet in laminar isotherm (no energy equation) case? Other BCs are Wall and Velocity Inlet (as outlet=negativ velocity)? This is perheaps only a theoretical problem! Thanks for your comments!

Volker Pawlik April 5, 2001 07:44

Re: inlet with OUTFLOW
 
I tried Inlet as outlet (=negativ velocity) plus pressure-inlet and it worked fine in my test case. But the handbook says, that the bc of the v-inlet as outlet would not be taken into account (Was is taken instead?). On the other hand my result of the massflow was exact that I conditioned by my v-inlet (as outlet). Hence continuity was not hurted.

From the point of solving differential equations it should be possible to have a pressure-inlet and v-outlet as bc instead of the opposite.

But maybe it causes other numerical problems.

Would be nice for me too to hear contributions from experts concerning this question.



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