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Realization of a thermal cloak-concentrator using a metamaterial transformer.


ABSTRACT: By combining rotating squares with auxetic properties, we developed a metamaterial transformer capable of realizing metamaterials with tunable functionalities. We investigated the use of a metamaterial transformer-based thermal cloak-concentrator that can change from a cloak to a concentrator when the device configuration is transformed. We established that the proposed dual-functional metamaterial can either thermally protect a region (cloak) or focus heat flux in a small region (concentrator). The dual functionality was verified by finite element simulations and validated by experiments with a specimen composed of copper, epoxy, and rotating squares. This work provides an effective and efficient method for controlling the gradient of heat, in addition to providing a reference for other thermal metamaterials to possess such controllable functionalities by adapting the concept of a metamaterial transformer.

SUBMITTER: Liu DP 

PROVIDER: S-EPMC5802869 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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Realization of a thermal cloak-concentrator using a metamaterial transformer.

Liu Ding-Peng DP   Chen Po-Jung PJ   Huang Hsin-Haou HH  

Scientific reports 20180206 1


By combining rotating squares with auxetic properties, we developed a metamaterial transformer capable of realizing metamaterials with tunable functionalities. We investigated the use of a metamaterial transformer-based thermal cloak-concentrator that can change from a cloak to a concentrator when the device configuration is transformed. We established that the proposed dual-functional metamaterial can either thermally protect a region (cloak) or focus heat flux in a small region (concentrator).  ...[more]

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