Hello, I have a diffusion problem where the diffusion coefficient K depends on the solution at the previous time step and is therefore discontinuous. I am trying to implement a weighted average for DG, which is similar to the standard average, with the difference that the weights are not 0.5, but a weighted average with the value of K on each side of a face. I have been using VectorTools::point_value to evaluate approximate solutions at given points, but now I need to evaluate those approximate solutions at the two neighboring cells. Do you have any idea about to how to approach this?
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