# Anisotropic porosity

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August 2, 2011, 10:54
Anisotropic porosity
#1
Member

Frank Weise
Join Date: Mar 2009
Location: Germany
Posts: 39
Rep Power: 10
Hi,

i try to simulate a flow thru a porous foil. The foil has a anisotropic porosity (a lot of cylindrical pipes). In Fig 1 can you see the fluid domain (yellow) and the foil (red) and another porous domain (blue). Figure 2 shows velocity vectors on the domain interface. In this case i've used the isotropic porosity. How can i define that the velocity vectors are perpendicular to the surface?

best regards
frank
Attached Images
 Fluid Flow.jpg (23.8 KB, 20 views) Fluid Flow2.jpg (29.1 KB, 14 views)

Last edited by FrankW; August 2, 2011 at 11:01. Reason: chane of punctuation mark

 August 2, 2011, 19:35 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 14,321 Rep Power: 110 You could define an anisotropic porosity which stops tangential flow but allows normal flow.

 August 3, 2011, 03:55 #3 Member   Frank Weise Join Date: Mar 2009 Location: Germany Posts: 39 Rep Power: 10 Yes, of course! It was my first idea, but i don't know how. I've a free form surface and i should define the streamline direction in x y and z. There is no possibility to set this normal to surface.

 August 3, 2011, 06:36 #4 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 14,321 Rep Power: 110 You could use 3 separate 3D interpolation functions, one for each component.

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