Prediction of Temperature Distribution during Microwave Irradiation Using Dimensionless Numbers

Abstract

The boiling experiment for a cylindrical vessel was conducted at different operating parameters such as stirring speed, microwave power, and the penetration depth of microwave. The heating rates and the time until boiling were obtained for the heating homogeneity, which is defined as ratio of the local heating within the penetration depth and the heating of the whole vessel. The ratio was estimated by correlation with two dimensionless numbers, the mixing Reynolds number (Re) and our dimensionless microwave number (As) proposed in our previous study. Although the heating ratio is linearly correlated to the simple combination of Re and As. However, it was found that the multiplier of As number depends on microwave power.