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how to specify a wall as porous wall in CFX

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Old   July 12, 2009, 00:48
Default how to specify a wall as porous wall in CFX
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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.
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Old   July 12, 2009, 06:55
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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.

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Old   July 12, 2009, 08:41
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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.

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Old   June 3, 2010, 08:03
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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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