›› 2014, Vol. 34 ›› Issue (5): 64-70,78.doi: 10.3780/j.issn.1000-758X.2014.05.009

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Study on Void Distribution Rule in Two-dimensional Quadrate Cavity of PCM Container

 JIAN  Lu-Jing, ZHANG  Jia-Xun, ZHAO  Xin, HUO  Yu-Hua   

  1. (BeijingKeyLaboratoryofSpaceThermalControlTechnology,Beijing100094)
  • Received:2014-01-08 Revised:2014-04-25 Published:2014-10-25 Online:2014-10-25

Abstract: To study the influence of the void on phase change heat transfer process under microgravity, the void model using temperature sorting algorithm was built based on the enthalpy method, which can simulate the interaction between the void and the temperature distribution. The 2D model of phase change material container was built to study the void migration rule under the periodical heat flux boundary condition. The results show that from the initial time to the 8th period the void disappears gradually in the low temperature region and appears in the high temperature region. The void moves to the high temperature region and diffuses along the isotherms. The void migration increases heat resistance along the heat transfer route and the temperature difference about 3℃ between cold and hot boundaries.

Key words: Solid-liquidphasechange, 2Dmodel, Quadratecavity, Void, Thermalcontrol, Spacecraft