中国物理B ›› 2023, Vol. 32 ›› Issue (6): 64402-064402.doi: 10.1088/1674-1056/acc78c

所属专题: SPECIAL TOPIC — Celebrating the 100th Anniversary of Physics Discipline of Xiamen University

• • 上一篇    下一篇

Enhancement of thermal rectification by asymmetry engineering of thermal conductivity and geometric structure for multi-segment thermal rectifier

Fu-Ye Du(杜甫烨)1, Wang Zhang(张望)1, Hui-Qiong Wang(王惠琼)1,2, and Jin-Cheng Zheng(郑金成)1,2,†   

  1. 1 Department of Physics, Xiamen University, Xiamen 361005, China;
    2 Department of Physics, Xiamen University Malaysia, 439000 Sepang, Selangor, Malaysia
  • 收稿日期:2022-12-13 修回日期:2023-02-17 接受日期:2023-03-25 出版日期:2023-05-17 发布日期:2023-05-17
  • 通讯作者: Jin-Cheng Zheng E-mail:jczheng@xmu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 12274355) and Xiamen University Malaysia Research Fund (Grant Nos. XMUMRF/2022-C9/IORI/003 and XMUMRF/2022-C10/IORI/004).

Enhancement of thermal rectification by asymmetry engineering of thermal conductivity and geometric structure for multi-segment thermal rectifier

Fu-Ye Du(杜甫烨)1, Wang Zhang(张望)1, Hui-Qiong Wang(王惠琼)1,2, and Jin-Cheng Zheng(郑金成)1,2,†   

  1. 1 Department of Physics, Xiamen University, Xiamen 361005, China;
    2 Department of Physics, Xiamen University Malaysia, 439000 Sepang, Selangor, Malaysia
  • Received:2022-12-13 Revised:2023-02-17 Accepted:2023-03-25 Online:2023-05-17 Published:2023-05-17
  • Contact: Jin-Cheng Zheng E-mail:jczheng@xmu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 12274355) and Xiamen University Malaysia Research Fund (Grant Nos. XMUMRF/2022-C9/IORI/003 and XMUMRF/2022-C10/IORI/004).

摘要: Thermal rectification is an exotic thermal transport phenomenon, an analog to electrical rectification, in which heat flux along one direction is larger than that in the other direction and is of significant interest in electronic device applications. However, achieving high thermal rectification efficiency or rectification ratio is still a scientific challenge. In this work, we performed a systematic simulation of thermal rectification by considering both efforts of thermal conductivity asymmetry and geometrical asymmetry in a multi-segment thermal rectifier. It is found that the high asymmetry of thermal conductivity and the asymmetry of the geometric structure of multi-segment thermal rectifiers can significantly enhance the thermal rectification, and the combination of both thermal conductivity asymmetry and geometrical asymmetry can further improve thermal rectification efficiency. This work suggests a possible way for improving thermal rectification devices by asymmetry engineering.

关键词: thermal conductivity, simulation, thermal rectification, multi-segment thermal rectifier

Abstract: Thermal rectification is an exotic thermal transport phenomenon, an analog to electrical rectification, in which heat flux along one direction is larger than that in the other direction and is of significant interest in electronic device applications. However, achieving high thermal rectification efficiency or rectification ratio is still a scientific challenge. In this work, we performed a systematic simulation of thermal rectification by considering both efforts of thermal conductivity asymmetry and geometrical asymmetry in a multi-segment thermal rectifier. It is found that the high asymmetry of thermal conductivity and the asymmetry of the geometric structure of multi-segment thermal rectifiers can significantly enhance the thermal rectification, and the combination of both thermal conductivity asymmetry and geometrical asymmetry can further improve thermal rectification efficiency. This work suggests a possible way for improving thermal rectification devices by asymmetry engineering.

Key words: thermal conductivity, simulation, thermal rectification, multi-segment thermal rectifier

中图分类号:  (Heat conduction)

  • 44.10.+i
66.30.Xj (Thermal diffusivity) 66.70.-f (Nonelectronic thermal conduction and heat-pulse propagation in solids;thermal waves)