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A Continuously Tunable Solid‐Like Convective Thermal Metadevice on the Reciprocal Line
Author(s) -
Li Jiaxin,
Li Ying,
Cao PeiChao,
Yang Tianzhi,
Zhu XueFeng,
Wang Wuyi,
Qiu ChengWei
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202003823
Subject(s) - thermal conduction , convection , convective heat transfer , materials science , thermal , electrical conductor , thermal conductivity , reciprocity (cultural anthropology) , heat transfer , mechanics , reciprocal , thermal radiation , optoelectronics , thermodynamics , composite material , physics , psychology , social psychology , linguistics , philosophy
The emerging thermal metamaterials and metadevices demonstrate significant potential to transform thermal conduction. However, the thermal conductivities of existing devices are all restricted at fixed values if the configuration or constituent materials are static. Thermal convection provides an additional tool to boost and flexibly modify the heat transfer in moving matter, but it is essentially distinct from thermal conduction since the Onsager reciprocity is generally broken in the former but preserved in the latter. Therefore, it is difficult to use convective components for sophisticated control of conductive heat. Here, it is shown that a convective system can be made undistinguishable from a conductive one in principle, by discovering and operating on the reciprocal line of mechanically rotating systems. The realized thermal metadevice can thus mimic a solid‐like material whose thermal conductivity dynamically covers a wide range. It offers great possibilities of real‐time smooth control over heat transfer for broad applications.