Hi all, does someone know, ho
 

Hi all,
does someone know, how to get the gradient of the velocity magnitude?

Thanks
Anja

volVectorField gradMagU = fvc:
 

volVectorField gradMagU = fvc::grad(mag(U));

Clear enough? :-)

Hrv

Yes, clear. And what about
 

Yes, clear.

And what about the normal velocity gradient, so that I receive a scalar?

Thanks again
Anja

Sorry, I've meant to get a sca
 

Sorry, I've meant to get a scalarField.

The normal velocity gradient r
 

The normal velocity gradient relative to what?

The gradient normal to the sur
 

The gradient normal to the surface, at least that exists for vectorFields, but I'm searching that for the scalarField magU.