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Tangential Component of Gradient???

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Old   June 29, 2011, 15:30
Exclamation Tangential Component of Gradient???
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Hi everybody,

I want to find the tangential component of gradient. I calculate



how can I calculate

Tangential grad????

I know


snGrad find the value which is the surface vector field, but my variable is volvectorfield so I couldn't use it.

How can I find the tangential component of gradient and how can I see the variables in ParaFoam.

Thanks for all helps.
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