HOW TO SPECIFY AN ANISOTROPIC SUBSTANCE

December 20, 2007, 06:20

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.

December 20, 2007, 07:44

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

December 20, 2007, 10:12

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

December 20, 2007, 06:20	HOW TO SPECIFY AN ANISOTROPIC SUBSTANCE	#1
VISHNU Guest Posts: n/a	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.

December 20, 2007, 07:44	Re: HOW TO SPECIFY AN ANISOTROPIC SUBSTANCE	#2
mac Guest Posts: n/a	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

December 20, 2007, 10:12	Re: HOW TO SPECIFY AN ANISOTROPIC SUBSTANCE	#3
opaque Guest Posts: n/a	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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