Influence of Electromagnetic Characteristics of Sodium Chloride on Temperature Change During Microwave Drying

摘要

Since the effect of microwave heating is closely related to the electromagnetic parameters of the material, the heated material often exhibits selective heating. This article uses a multi-mode microwave resonant cavity to heat sodium chloride. The finite difference time domain (FDTD) method was used to simulate the electromagnetic field and thermal field equation in the microwave heating process. The heating rate of microwave heating sodium chloride was changed in real time with the change of the electromagnetic characteristic parameters. The analysis results show that with the increase of the relative permittivity of sodium chloride, the electric field intensity of sodium chloride in the cavity increases, the heating rate increases, and the distribution of the electromagnetic field becomes more uniform.