Volume 44 Issue 3
Jun.  2024
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Article Navigation >  Chinese Journal of Space Science  > 2024  >  44(3): 536-543 Open Access
ZHANG Yongchun, DONG Wenli, SUN Tao, GAO Yinyu, LI Zhirou, DUAN Wenhao, ZHOU Xiaoming. Evolution Mechanism of Phase Change Materials Liquid-bridge Phase Transition and Thermocapillary Convection under Microgravity Conditions (in Chinese). Chinese Journal of Space Science, 2024, 44(3): 536-543 doi: 10.11728/cjss2024.03.2023-0105
Citation: ZHANG Yongchun, DONG Wenli, SUN Tao, GAO Yinyu, LI Zhirou, DUAN Wenhao, ZHOU Xiaoming. Evolution Mechanism of Phase Change Materials Liquid-bridge Phase Transition and Thermocapillary Convection under Microgravity Conditions (in Chinese). Chinese Journal of Space Science, 2024, 44(3): 536-543 doi: 10.11728/cjss2024.03.2023-0105
shu

Evolution Mechanism of Phase Change Materials Liquid-bridge Phase Transition and Thermocapillary Convection under Microgravity Conditions

doi: 10.11728/cjss2024.03.2023-0105 cstr: 32142.14.cjss2024.03.2023-0105
  • 1.

    Jiangsu Institute of Special Equipment Safety Supervision and Inspection, Nanjing 210036

  • 2.

    College of Mechanical and Electrical Engineering, Hohai University, Nanjing 210024

  • Received Date: 2023-09-25
  • Accepted Date: 2024-05-13
  • Rev Recd Date: 2023-11-26
    • Available Online: 2024-01-02
    Abstract
  • In order to reveal the flow characteristics and evolution law of PCM liquid-bridge phase transition under microgravity conditions, the evolution process of solid-liquid interface during PCM liquid-bridge phase transition under different working conditions was numerically studied based on numerical simulation method. The effects of different height-diameter ratio and temperature difference on the shape of liquid bridge, the evolution law of solid-liquid interface, phase transition velocity and thermal capillary flow were analyzed. The results show that under the condition of large temperature difference, the thermal capillary flow is more intense, the phase transition speed of the phase change material at the outer wall is faster, and the angle between the phase change interface at the outer wall and the wall is smaller. Under the condition of large aspect ratio, the same effect will be achieved, and more vortex cell structures will be generated, and the thermal capillary convection effect is more obvious. The results show that strengthening PCM phase transition through fluid interface thermal capillary effect under microgravity conditions is an effective method.

     

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