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-   -   Opening boundary condition (http://www.cfd-online.com/Forums/fluent/101681-opening-boundary-condition.html)

sicfred May 10, 2012 11:10

Opening boundary condition
 
Hi all,

My question is quite simple:
Is there an "Opening" BC in Fluent like in CFX? Because, I usually use the "pressure_outlet" to achive this condition (gauge pressure=0), but I'm not really sure if it is a correct solution.

Regards

delaneyluke May 11, 2012 02:21

The Opening BC in CFX is also a pressure outlet BC. Only difference is that it allows a reversed flow and does not close off faces which encounter a reversed flow (like the pressure outlet BC does in CFX)

Regards
Luke

sicfred May 11, 2012 06:18

Thanks Luke,

And, do you know if it exist a big difference between use pressure inlet or pressure outlet in this case?, because i saw people in the forum using pressure inlet, and i think it is not a good solution.

delaneyluke May 11, 2012 06:46

In which case? What are you trying to analyse?
In most cases a pressure inlet with a pressure outlet is the most stable BC combo

Regards
Luke


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