[Getfem-users] Export velocity gradient .vtk

[Eleonora Piersanti]

Hi to everyone!

I computed a 2D velocity field U based on P2 elements. I computed its gradient with the function:

getfem::compute_gradient(mf1, mf2, U, V),

where mf1 is P2 element, mf2 is P1 element, U is the velocity vector and V is the vector containing the gradient which dimensions are 2*mf2.nb_dof() as prescribed by the userguide.

It seems to work.

Now, I would export the gradient field in .vtk. How can I do?

Thank you,

Nora