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Old   August 2, 2011, 10:54
Default Anisotropic porosity
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Frank Weise
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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
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File Type: jpg Fluid Flow.jpg (23.8 KB, 17 views)
File Type: jpg Fluid Flow2.jpg (29.1 KB, 12 views)

Last edited by FrankW; August 2, 2011 at 11:01. Reason: chane of punctuation mark
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Old   August 2, 2011, 19:35
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Glenn Horrocks
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You could define an anisotropic porosity which stops tangential flow but allows normal flow.
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Old   August 3, 2011, 03:55
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Frank Weise
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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.
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Old   August 3, 2011, 06:36
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You could use 3 separate 3D interpolation functions, one for each component.
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