Unconventional thermal cloak hiding an object outside the cloak
- 1 November 2013
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 104 (4), 44001
- https://doi.org/10.1209/0295-5075/104/44001
Abstract
All the thermal cloaks reported in the literature can be used to thermally hide an object inside the cloak. However, a common limitation of this kind of thermal cloaks is that the cloaked object cannot feel the external heat flow since it is located inside the cloak; thus we call these cloaks “conventional thermal cloaks”. Here we manage to overcome this limitation by exploiting a class of unconventional thermal cloaks that enable the cloaked object to feel the external heat flow. Our finite-element simulations in two dimensions show the desired cloaking effect. The underlying mechanism originates from the complementary effect of thermal metamaterials with negative thermal conductivities. This work suggests a different method to design thermal devices where heat conduction can be controlled at will.Keywords
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This publication has 16 references indexed in Scilit:
- A transient thermal cloak experimentally realized through a rescaled diffusion equation with anisotropic thermal diffusivityNPG Asia Materials, 2013
- Heat flux cloaking, focusing, and reversal in ultra-thin composites considering conduction-convection effectsApplied Physics Letters, 2013
- Design of two-dimensional open cloaks with finite material parameters for thermodynamicsApplied Physics Letters, 2013
- Transient heat flux shielding using thermal metamaterialsApplied Physics Letters, 2013
- Experiments on Transformation Thermodynamics: Molding the Flow of HeatPhysical Review Letters, 2013
- Homogeneous Thermal Cloak with Constant Conductivity and Tunable Heat LocalizationScientific Reports, 2013
- Heat Flux Manipulation with Engineered Thermal MaterialsPhysical Review Letters, 2012
- Transformation thermodynamics: cloaking and concentrating heat fluxOptics Express, 2012
- A bifunctional cloak using transformation mediaJournal of Applied Physics, 2010
- Shaped graded materials with an apparent negative thermal conductivityApplied Physics Letters, 2008