中国物理B ›› 2023, Vol. 32 ›› Issue (5): 54401-054401.doi: 10.1088/1674-1056/aca9c1

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Thermal rectification induced by Wenzel-Cassie wetting state transition on nano-structured solid-liquid interfaces

Haiyang Li(李海洋), Jun Wang(王军), and Guodong Xia(夏国栋)   

  1. MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing 100124, China
  • 收稿日期:2022-10-01 修回日期:2022-11-17 接受日期:2022-12-08 出版日期:2023-04-21 发布日期:2023-05-05
  • 通讯作者: Jun Wang E-mail:jwang@bjut.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51976002), and the Beijing Nova Program of Science and Technology (Grant No. Z191100001119033).

Thermal rectification induced by Wenzel-Cassie wetting state transition on nano-structured solid-liquid interfaces

Haiyang Li(李海洋), Jun Wang(王军), and Guodong Xia(夏国栋)   

  1. MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing 100124, China
  • Received:2022-10-01 Revised:2022-11-17 Accepted:2022-12-08 Online:2023-04-21 Published:2023-05-05
  • Contact: Jun Wang E-mail:jwang@bjut.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51976002), and the Beijing Nova Program of Science and Technology (Grant No. Z191100001119033).

摘要: Thermal rectification refers to the phenomenon by which the magnitude of the heat flux in one direction is much larger than that in the opposite direction. In this study, we propose to implement the thermal rectification phenomenon in an asymmetric solid-liquid-solid sandwiched system with a nano-structured interface. By using the non-equilibrium molecular dynamics simulations, the thermal transport through the solid-liquid-solid system is examined, and the thermal rectification phenomenon can be observed. It is revealed that the thermal rectification effect can be attributed to the significant difference in the interfacial thermal resistance between Cassie and Wenzel states when reversing the temperature bias. In addition, effects of the liquid density, solid-liquid bonding strength and nanostructure size on the thermal rectification are examined. The findings may provide a new way for designs of certain thermal devices.

关键词: thermal rectification, wetting transition, interfacial thermal resistance, solid-liquid interfaces

Abstract: Thermal rectification refers to the phenomenon by which the magnitude of the heat flux in one direction is much larger than that in the opposite direction. In this study, we propose to implement the thermal rectification phenomenon in an asymmetric solid-liquid-solid sandwiched system with a nano-structured interface. By using the non-equilibrium molecular dynamics simulations, the thermal transport through the solid-liquid-solid system is examined, and the thermal rectification phenomenon can be observed. It is revealed that the thermal rectification effect can be attributed to the significant difference in the interfacial thermal resistance between Cassie and Wenzel states when reversing the temperature bias. In addition, effects of the liquid density, solid-liquid bonding strength and nanostructure size on the thermal rectification are examined. The findings may provide a new way for designs of certain thermal devices.

Key words: thermal rectification, wetting transition, interfacial thermal resistance, solid-liquid interfaces

中图分类号:  (Other topics in heat transfer)

  • 44.90.+c
61.30.Hn (Surface phenomena: alignment, anchoring, anchoring transitions, surface-induced layering, surface-induced ordering, wetting, prewetting transitions, and wetting transitions) 68.08.-p (Liquid-solid interfaces)