Hi all, I am following one of the fenics examples for the tensor-weighted-poisson . In there, they use the MeshFunction objects to represent elements of the conductivity tensor, i.e., the conductivity is constant actors a single mesh cell. I was wondering if there is a way to modify this example so …

Simply use x =dolfin.SpatialCoordinate(mesh) r2 = x[0]**2+x[1]**2 D = dolfin.as_tensor(((r2,x[0]),(x[0], r2 )))

Using continious funstions to define conductivity tensor

dokken July 24, 2023, 8:00pm 2

Yes, there are various ways of doing this.
See for instance Define two materials C tensor - #7 by dokken

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