Mathematical modelling of dielectrics microwave heating

Abstract

Considered in this work is the microwave heating of a semi-infinite dielectric layer at a known surface distribution of microwave power. The paper presents calculation results of the temperature in a dielectric layer for a single microwave radiator, as well as for a multi-element radiator system. We present an analytical discussion of the 2D task concerning the non-stationary thermal conductivity for a semi-infinite dielectric layer, when the plane electromagnetic wave is incident on its surface. For the wave, the power surface distribution is assumed to be known. The basic requirement, specific to microwave heating plants, is temperature field uniformity for the whole volume of processed material or some of its parts. In order to obtain uniform microwave heating of the object, we used a multi-element radiating system, located above its surface. The experimental results show that multi-element radiator systems allow us to obtain a more uniform temperature distribution, compared with single radiators.