Tangential Component of Gradient???
 

Hi everybody,

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

grad=-fvc::grad(phi)

then

how can I calculate

Tangential grad????

I know

"Grad_tangential=grad-grad_normal"

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.