Engineering the accurate distortion of an object’s temperature-distribution signature

Chen, Yixuan; Shen, Xiangying; Huang, Jiping

doi:10.1051/epjap/2015140224

Cited by 17 publications

(15 citation statements)

References 23 publications

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“…So far, the steady-state thermal cloak [8] and its theoretical extensions [9,10] have been experimentally realized or developed [11][12][13][14][15]. Meanwhile, researchers also designed a lot of thermal metamaterials with novel thermal characteristics beyond cloaking [9][10][11][16][17][18][19][20][21][22][23][24], such as concentrators [10,11,16]. The concentrator helps to focus heat flux in a particular region, and thus yields a higher temperature gradient inside the region, which can be used to improve the efficiency for thermal-to-electrical conversion (the Seebeck effect [25,26]).…”

Section: Introductionmentioning

confidence: 99%

Thermal cloak-concentrator

Shen

Jiang

et al. 2016

Applied Physics Letters

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127

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How to macroscopically control the flow of heat at will is up to now a challenge, which, however, is very important for human life since heat flow is a ubiquitous phenomenon in nature. Inspired by intelligent electronic components or intelligent materials, here we demonstrate, analytically and numerically, a unique class of intelligent bifunctional thermal metamaterials called thermal cloakconcentrators, which can automatically change from a cloak (concentrator) to a concentrator (cloak) when the applied temperature field decreases (increases). For future experimental realization, the behavior is also confirmed by assembling homogeneous isotropic materials according to the effective medium theory. The underlying mechanism originates from the effect of nonlinearity in thermal conduction. This work not only makes it possible to achieve a switchable Seebeck effect, but also offers guidance both for macroscopic manipulation of heat flow at will and for the design of similar intelligent multifunctional metamaterials in

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Section: Introductionmentioning

confidence: 99%

Thermal cloak-concentrator

Shen

Jiang

et al. 2016

Applied Physics Letters

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127

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“…Other interesting works of camouflage could be also checked in refs. [73,[98][99][100][101][102][103][104].…”

Section: Transformation Thermodynamicsmentioning

confidence: 99%

A Brief Review on Thermal Metamaterials for Cloaking and Heat Flux Manipulation

2019

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Progress in material science has allowed the control of different physical fields in a manner that would be unachievable with ordinary materials. The development of engineered materials (the so‐called metamaterials) to control the conductive heat flux has revolutionized the manner of manipulating thermal energy and allowed the possibility of guiding the heat flux in ways difficult to accept for human intuition. Herein, a brief review regarding the recent progress and developments in thermal metamaterials conceived to perform several conductive heat flux manipulation tasks is provided. Deeply theoretical discussions concerning design methodologies are left a side, and the focus is made on the design and manufacturing feasibility of metamaterials for thermal cloaking and camouflage, heat flux concentration, and inversion, among other applications that lead to the next generation of thermal devices.

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Section: Introductionmentioning

confidence: 99%

“…Since 2008, thermal metamaterials or metadevices have been intensively studied, in order to achieve invisibility, 1-13 illusion [15][16][17][18][19][20][21] and other inconceivable thermal properties or functions, such as concentrators, 4,5,11,12 macroscopic diodes 10 and energy-free thermostats. 22 On the one hand, most of the devices are designed based on the theory of coordinate transformation, [1][2][3][4][5][6][10][11][12][18][19][20] which originates from the pioneering work on electromagnetic waves in 2006. 23 For example, this theory helps to predict and realize the effect of thermal cloaking (which helps to let the heat flow around an object as if the object does not exist) [1][2][3][4][5][6][7][8][9][10][11][12] and concentrating (which corresponds to the concentration of heat in a specific region).…”

Section: Introductionmentioning

confidence: 99%

A thermal theory for unifying and designing transparency, concentrating and cloaking

Wang

et al. 2018

Journal of Applied Physics

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In the existing literature of thermal metamaterials or metadevices, many properties or functions are designed via coordinate transformation theory (transformation thermotics), including thermal concentrating and cloaking. But other properties or functions, say, thermal transparency, are designed by using theories differing from the transformation thermotics. Here, we put forward an effective medium theory in thermotics by considering anisotropic layered/graded structures, and we reveal that the theory can unify transparency, concentrating, and cloaking into the same theoretical framework. Furthermore, the theory not only gives the criterion for transparency, concentrating, and cloaking, but also helps to predict a type of ellipses-embedded structures which can achieve transparency, concentrating, and cloaking, respectively. The prediction is confirmed by our finiteelement simulations and/or experiments. This work provides a different theory to understand and design thermal metamaterials or metadevices, which might be extended to other disciplines, such as optics/electromagnetics and acoustics.

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Engineering the accurate distortion of an object’s temperature-distribution signature

Cited by 17 publications

References 23 publications

Thermal cloak-concentrator

Thermal cloak-concentrator

A Brief Review on Thermal Metamaterials for Cloaking and Heat Flux Manipulation

A thermal theory for unifying and designing transparency, concentrating and cloaking

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