Multiphysics analysis for unusual heat convection in microwave heating liquid

Peiyang Zhao; Weiwei Gan; Chuanqi Feng; Zhongxing Qu; Jianlong Liu; Zhe Wu; Yubin Gong; Baoqing Zeng

doi:10.1063/5.0013295

AIP Advances (Aug 2020)

Multiphysics analysis for unusual heat convection in microwave heating liquid

Peiyang Zhao,
Weiwei Gan,
Chuanqi Feng,
Zhongxing Qu,
Jianlong Liu,
Zhe Wu,
Yubin Gong,
Baoqing Zeng

Affiliations

Peiyang Zhao: School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu 611731, China
Weiwei Gan: School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu 611731, China
Chuanqi Feng: School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu 611731, China
Zhongxing Qu: School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu 611731, China
Jianlong Liu: School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu 611731, China
Zhe Wu: School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
Yubin Gong: School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu 611731, China
Baoqing Zeng: School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu 611731, China

DOI: https://doi.org/10.1063/5.0013295
Journal volume & issue: Vol. 10, no. 8
pp. 085201 – 085201-7

Abstract

Read online

Usually, the fluidity of liquids is considered to make the temperature field uniform, when it is heated, because of the heat convection, but there is something different when microwave heating. The temperature of the top is always the highest in the liquid when heated by microwaves. In this paper, the multiphysics simulation and experimental comparison of the temperature distribution of microwave heated water and alcohol and microwave reheated rice are performed. In order to make the temperature distribution of liquids heated by microwaves uniform, the cut-off waveguide is used to control microwave heating and improve the temperature uniformity. The experimental results show that when the modified glass cup with 7 cm metal coating is used to heat water in a microwave oven, the temperature difference between the upper and lower parts of the water is reduced from 7.8 °C to 0.5 °C. The modified glass cup is placed in the center of the ceramic plate, far away from the cavity wall, and there is no spark ignition.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

About the journal