Thermal Cloak: Theory, Experiment and Application.

Xiuli Yue,Tiancheng Han,Peiyan Chen,Junyi Nangong

doi:10.3390/ma14247835

Abstract

In the past two decades, owing to the development of metamaterials and the theoretical tools of transformation optics and the scattering cancellation method, a plethora of unprecedented functional devices, especially invisibility cloaks, have been experimentally demonstrated in various fields, e.g., electromagnetics, acoustics, and thermodynamics. Since the first thermal cloak was theoretically reported in 2008 and experimentally demonstrated in 2012, great progress has been made in both theory and experiment. In this review, we report the recent advances in thermal cloaks, including the theoretical designs, experimental realizations, and potential applications. The three areas are classified according to the different mechanisms of heat transfer, namely, thermal conduction, thermal convection, and thermal radiation. We also provide an outlook toward the challenges and future directions in this fascinating area.

Highlights

University of Electronic Science and Technology of China, Chengdu 610054, China; State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
After the realization of invisibility cloaks at microwave frequencies [2], the concept has been extended to various applications including thermal cloaks [3,4,5,6,7,8,9,10], acoustic cloaks [11,12], matter-waves cloaks [13,14], and elastic-waves cloaks [15,16]
We divide thermal cloaks into three sections according to different types of heat transfer

Summary

Theoretical Design

Heat and mass transfer are coupled with each other [7,63]. In this case, the convection–diffusion equation andtransfer fluid movement need with to be each combined analysis. The established theory for based transforming thermal convection at the[64]. Steady state in porous media ha and Darcy’s law are used to form equations, which remain invariant as coordinate systems been established based on the convection–diffusion equation [64]. The continuity equatio and Darcy’s law are used to form equations, which remain invariant as coordinate system change [7].

Experimental Realization

Demonstration

Application

Thermal

Design

Conclusions