Published by the Institute of Electrical and Electronics Engineers for the Magnetics Group
IEEE Transactions on Magnetics vol:44 issue:6 pages:706-709
The discretization of an electrostatic problem by the finite integration technique (FIT) is augmented with specialized finite-element
shape functions for resolving dielectric interfaces that are not resolved by the Cartesian grid. The numerical validation shows that the
achieved accuracy matches the one of a conformal discretization. The additional approximation space is implemented as a perturbation
of the original Cartesian FIT formulation.