3-D FE discontinuous sheet for microwave heating

This paper presents a method for modeling the electromagnetic properties of thin metallic films typical of electromagnetically active food packages within multimode microwave applicators. A discontinuous sheet with six degrees of freedom (DOF) is incorporated within a time- or frequency-domain edge finite-element formulation by splitting the tetrahedral-element discretized domain on the thin-film surface and adding new DOF. Superior accuracy is observed when comparing with existing surface sheet conditions. Thermal image validation is provided for multimode applications.