solving the Poisson equation to calculate the electrical potential inside an arbitrary solid

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Hi! I want to solve the Poisson equation to calculate the electrical potential inside an arbitrary solid that I would take from a CAD model, the solid will be a cylinder (radius=4 cm, lenght=20cm) with multiple layers, each with a specific thickness and resistivity or impedance. The source of the electrical potential will be two electrodes located on the periphery of this cylinder in arbitrary locations. The geometry of the electrodes or sources will also be arbitrary and taken from a CAD model. The electrical potential produced by the sources will be an arbitray periodic signal.

I need to be able to visualize the electrical potential inside the cylinder in 3 dimensions.

s this possible using FENICS?

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Hi for those interested, a problem like this is well explained in the Chapter 4 "Subdomains and boundary conditions" of the book “Solving PDEs in Python - The FEniCS Tutorial Volume I” by Hans Petter Langtangen , Anders Logg.

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