I am trying to simulate a problem in COMSOL, whereby I have to study the difference in electric field distribution using different liquids as dielectrics. I have constructed a 2-D geometry with a point plane electrode configuration using oil as a dielectric material. My constitutive relation for Electric Field is relative permittivity. However, when I change the value of relative permittivity using same or different types of oil, the electric field distribution doesnot change. I can not figure out where the problem lies and need help with the simulation.
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