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How tensor parameters to be entered in CFX-pre?

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Old   May 4, 2013, 10:23
Exclamation How tensor parameters to be entered in CFX-pre?
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hadi
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hi
I m trying to simulate Flow through porous media and I'd enter the permeability parameter from a tensor.But I do not know how?
(ansys CFX-pre/defalt domaine/porous domaine/porosity setting/permeability)
(for Simulation of Vacuum Assisted Resin Transfer Molding process)
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Old   May 4, 2013, 10:25
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Old   May 7, 2013, 04:04
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ANSYS CFX presently allows only K(permeability) to be isotropic ( Ansys CFX help)
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Old   May 10, 2013, 14:01
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Erik
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You could try three different momentum sources (pourous loss model) one in each direction. Someone else had this idea, I've never tried it.
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Old   May 10, 2013, 23:41
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That's right. If you don't like the built in porous models you can always do your own.

But if he wants to specify it as a tensor it is a bit more complex - getting those high order terms in there will be tricky. But if all he wants is to specify a permeability in each direction this is easy to do with your own source term.
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Old   May 11, 2013, 11:27
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yes.I wants is to specify a permeability in each direction .
but how?
ansys CFX only accepts scaler for permeability.
"easy to do with your own source term". How?
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Old   May 12, 2013, 07:08
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The CFX porosity model just generates a source term. There is a little tricky stuff for convergence, but mainly a source term. But you can write your own source terms, so then you could write your own source term which is a porosity model which works in any way you like. So this means do not use the built in porosity model, use a source term instead and you will have to write the equations of the source term yourself - of course.
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Old   May 13, 2013, 03:38
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hi.
Thank you for answering my problem.
Where's sours equations can be entered. If possible, take an example.
THX
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Old   May 13, 2013, 06:28
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Look up source terms in the documentation.
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