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-   -   Boundary Condition of internal Faces (http://www.cfd-online.com/Forums/fluent/37705-boundary-condition-internal-faces.html)

Gernot August 26, 2005 01:38

Boundary Condition of internal Faces
 
Which boundary condition do I have to use for an internal face. That means a face which only connect two volumes without any function.

I declared these faces without any boundary condition, but is it right or do I have to take anotherone, e.g. internal or interior ?

Thanks Gernot

Ralf Schmidt August 26, 2005 02:39

Re: Boundary Condition of internal Faces
 
hi

use "internal" as BC, but take care, that the face is shared by two volumes. Otherwise Fluent will transform it into a wall.

Refere also to

http://www.cfd-online.com/Forum/fluent.cgi?read=30516

Ralf

Gernot August 26, 2005 03:59

Re: Boundary Condition of internal Faces
 
What happens when I don't define this face. So the internal face has got nothing boundary condition. My computation works with this setup, but I haven't seen the results.

Ralf Schmidt August 26, 2005 04:14

Re: Boundary Condition of internal Faces
 
as far as I know, every face that is not defined will be transformed by Fluent into a wall.

edi August 26, 2005 05:05

Re: Boundary Condition of internal Faces
 
Every undefined face AT THE BOUNDARY is set as "wall" by gambit when generating the msh file. When you have a face shared by two volumes is automatically set as "interior" if unspecified, that is: simply no need for inputs from you.

Edi.

Gernot August 26, 2005 13:02

Re: Boundary Condition of internal Faces
 
thanks a lot for the statements my friends !!!


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