Non-Linear Field Solutions of One-Diemensional Microwave Heating

A mathematical model for predicting microwave heating rates and associated temperature distributions in materials with varying dielectric properties is formulated. The nonlinear system is solved numerically by finite difference methods and error checking is incorporated into the resulting computer package to ensure accurate results. Simulations are pelformed for timber placed on a metal backing and the profiles compared for two different thicknesses. It is shown how control over heat transfer and associated temperature gradients may be obtained by using a dielectric layer, e.g. teflon, placed between the material and the metal backing. Results of heat transfer are given for varying teflon thicknesses for a constant timber thickness in a microwave environment.