Hi there, Is it possible to interpolate the gradient of a dolfin function? My idea was: J = interpolate(grad(u), V) But that doesn’t work.

The gradient of a function has to be interpolated into an appropriate space. Thus is V = FunctionSpace(mesh, "CG", 1), the appropriate space for the gradient is W=VectorFunctionSpace(mesh, "DG", 0). Next time, add a minimal code illustrating your problem, that can be copy-pasted in to any editor a…

Interpolate the gradient of a dolfin function

VKTR January 29, 2021, 10:25am 3

Okay, I will. Thank you dokken, you’re a hero.

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Interpolate the gradient of a dolfin function

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