I wanted to simulate a case where inside my simulation volume i have a sphere which has absorbing boundary conditions.
Additionally i still want to keep the planes defined before for the boundary conditions.
I tried to drag and drop the sphere but it doesn't work.
Is such simulation case possible ?
Assigning boundary conditions to an arbitrary object
I don't think the built-in absorbing boundary conditions can deal with anything else than the 6 faces of the computational domain.
I suppose you would have to create your own sphere-shaped absorber, but I don't really know how that can be done. Perhaps by having a series of nested spheres with different radii and cleverly chosen conductivity? Surely there is something in the literature on this topic.