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VACUUM ›› 2020, Vol. 57 ›› Issue (4): 60-65.doi: 10.13385/j.cnki.vacuum.2020.04.13

• Vacuum Technology Application • Previous Articles     Next Articles

Numerical Simulation of Microwave Vacuum Drying Using Two-dimensional Axi-symmetric Model

SU Tian-yi1, ZHANG Zhi-jun1, HAN Jing-xue2   

  1. 1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China;
    2. Vacuum Dry Pump Business Division, SKY Technology Development CO. Ltd, Chinese Academy of Sciences, Shenyang 110179, China
  • Received:2019-09-11 Online:2020-07-25 Published:2020-07-23

Abstract: In this article, a two-dimensional axi-symmetric model of multi-physical porous media is developed to numerically simulate the microwave vacuum drying process. It indicates that, with the increase of environmental vacuum degree during the microwave vacuum drying process, the dried samples can be dried rapidly at a lower temperature, thus the drying efficiency and product quality can be improved. The temperature and water uniformity inside the sample become worse with the increase of ambient vacuum. Therefore, scarification of acceptable amount of drying, decreasing of the total output microwave energy or microwave power can improve the temperature and water uniformity of dried samples.

Key words: microwave vacuum drying, two-dimensional axi-symmetric model, simulation.

CLC Number: 

  • TS255.1
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