A tunable three-dimensional thermal invisibility cloak based on multilayer graphene ring layers

Abstract

The invention provides an adjustable and controllable three-dimensional thermal invisibility cloak based on multiple annular graphene layers. The adjustable and controllable three-dimensional thermal invisibility cloak is achieved through a surface covering shell layer composed of graphene. The surface covering shell layer is formed in the manner that the multiple graphene annular layers are stacked from bottom to top. All the layers can correspond to different thermal conductivity coefficients through control over the Fermi level distribution of graphene in the different annular layers, and then three-dimensional thermal conductivity distribution needed by thermal invisibility is obtained; and then, after thermal flow winds around the cloak area, a temperature field and an isotherm recover original distribution, and therefore the thermal invisibility function is achieved. Meanwhile, the real-time switching on / off performance of the thermal invisibility cloak is achieved through circular control over the Fermi level distribution of graphene in each annular layer, and therefore the defect that the thermal invisibility cloak cannot be circularly switched on or off is overcome.

Description

technical field [0001] The invention relates to a method and device for realizing an adjustable three-dimensional thermal invisibility cloak based on multilayer graphene ring layers, which can be applied to the field of heat flow control. Background technique [0002] In 2006, Document 1: "J.B.Pendry et al, SCIENCE, 2006(312): 1780" proposed for the first time that the use of anisotropic media can manipulate the propagation direction of light waves and realize the concept of optical cloaking, which has attracted widespread attention and has become an important field in the field of optics. research hotspots. At the same time, as an expanded field of optical cloak application, that is to manipulate the direction of heat flow through artificial structures to achieve thermal cloaking has quickly become a hot issue in the field of thermodynamics. In 2013, document 2: "R. Schittny et al, Phys. Rev. Lett. 2013(110): 195901" used copper and polydimethylsiloxane to make a two-dimen...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: overcome the shortcoming that most of the existing thermal stealth cloaks are based on two-dimensional planar structure, and the thermal stealth function of the thermal stealth cloak does not possess tunability (that is, the thermal stealth function cannot be turned on / off), and utilize graphite Graphene, a common material, provides a new technology to realize an adjustable (open / close) three-dimensional thermal invisibility cloak, which makes the system have simple structure, fast speed, easy operation, low energy consumption, strong real-time performance and low implementation cost. advantage

Images