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How to calculate the gradient of diffusivity?

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Old   February 4, 2013, 08:29
Default How to calculate the gradient of diffusivity?
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One of heat sources to energy equation is associated with the gradient of diffusivity but this diffusivity is not available in 'Materials' directly. In this case, any idea to get its gradient?

Last edited by Raymond.Leoi; February 4, 2013 at 13:42.
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