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sagila July 2, 2012 11:37

B.C. for an opening between inside and outside
Dear all,

Which boundary condition is the best for an opening between inside and outside?
Note that the air flow is possible through this opening without any limitation.

Thank you in advance.

flotus1 July 3, 2012 02:50

In most cases, an opening would be a suitable choice.

It allows the flow to leave and enter the domain. An outlet would prevent the flow from entering the computational domain.

sagila July 3, 2012 04:28

Dear Alexander Stief,
Thank you for your reply.
I searched for the B.C. type of “opening”, but I have not found that.
Could you please let me know where I could define it? Or, just leave it and it would be automatically assumed as the opening?
Best regards,

flotus1 July 3, 2012 04:33

Sorry, my bad. The name "opening" only exists in CCM+.

In fluent, the "pressure outlet" corresponds to this type of boundary condition.

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