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HOW TO SPECIFY AN ANISOTROPIC SUBSTANCE

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Old   December 20, 2007, 07:20
Default HOW TO SPECIFY AN ANISOTROPIC SUBSTANCE
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VISHNU
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HAI ALL,

I'm dealing with a model in which heat conductivity is different in radial and axial directions.Please can any one help me by telling the method of how i can specify different conductivity in radial and axial directions.
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Old   December 20, 2007, 08:44
Default Re: HOW TO SPECIFY AN ANISOTROPIC SUBSTANCE
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mac
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You've two solutions 1st more simple is to use (step) function in CEL 2nd to use a subroutine where the argument will be the radius and axial direction
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Old   December 20, 2007, 11:12
Default Re: HOW TO SPECIFY AN ANISOTROPIC SUBSTANCE
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opaque
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Dear Vishnu,

Please contact the ANSYS CFX help desk and request information on how to setup an anisotropic thermal conductivity. This is a hidden feature of the solver since the 5.6 (or 5.7 release) that has not made it to the GUI yet.

Mac's approach is not valid because he is thinking about a position dependent isotropic thermal conductivity. You need to input data for the Thermal Conductivity Tensor, and the solver will compute the heat flux as

q = K_ij * grad (T)

Opaque

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