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-   -   how to specify a wall as porous wall in CFX (http://www.cfd-online.com/Forums/cfx/66328-how-specify-wall-porous-wall-cfx.html)

nagarjuna reddy July 12, 2009 00:48

how to specify a wall as porous wall in CFX
 
hi all, i struck up with a small problem. i.e how to specify a wall as a porus wall in cfx. Can any one please help me in this regard.

ghorrocks July 12, 2009 06:55

Hi,

CFX supports porous regions. Look in the documentation for details.

But I am guessing this is not what you are looking for - do you mean you want to do wall boundary layer suction like in a wind tunnel? If you can describe what type of flow you are trying to model we might be of more assistance.

Glenn Horrocks

nagarjuna reddy July 12, 2009 08:41

thanks for your suggestion..Well, my problem is, i need to specify a wall as no slip wall and at the same time i want to inject a gas from it by placing a hole.i need to specify only normal component of velocity at the wall and tangential component as zero.which boundary condition i can use for this contest in CFX.
Can anyone please help me in this regard.

ghorrocks June 3, 2010 08:03

The thread got pointed to by another post...

The answer is to use a mass source on a wall boundary. This will allow for the creation of a prescribed mass flow rate of fluid but retains a no slip wall boundary.


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