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Forum: CFX

February 10, 2011, 17:00

Replies: 11

Gradient of a variable in CFX

Views: 5,101

Posted By ghorrocks

Back to my previous post.... I am still puzzled...

Back to my previous post.... I am still puzzled by what you are trying to do. Surface tension is usually constant (so dS/dT=0 where S is surface tension and T is temperature) so if it is not constant...

Forum: CFX

February 10, 2011, 05:59

Replies: 11

Gradient of a variable in CFX

Views: 5,101

Posted By ghorrocks

OK, no problem.

OK, no problem.

Forum: CFX

February 10, 2011, 04:15

Replies: 11

Gradient of a variable in CFX

Views: 5,101

Posted By ghorrocks

Um, why are you doing this? If you have a surface...

Um, why are you doing this? If you have a surface tension set as a function of temperature you already know the gradient of the surface tension WRT to temperature, so why get CFX to calculate it?

Forum: CFX

February 9, 2011, 18:36

Replies: 11

Gradient of a variable in CFX

Views: 5,101

Posted By ghorrocks

You cannot do it directly. You can only do...

You cannot do it directly. You can only do gradients like that WRT space. But dV/dT=dV/dX * 1/(dT/dX) so you should be able to calculate it from the spatial gradients of your variable and temperature.

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