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Open AccessArticle

Directed Thermal Diffusions through Metamaterial Source Illusion with Homogeneous Natural Media

1
School of Energy Science and Engineering, Harbin institute of Technology, Harbin 150001, China
2
Center of Applied Space Technology and Microgravity (ZARM), University of Bremen, 28359 Bremen, Germany
*
Author to whom correspondence should be addressed.
Materials 2018, 11(4), 629; https://doi.org/10.3390/ma11040629
Received: 3 March 2018 / Revised: 26 March 2018 / Accepted: 18 April 2018 / Published: 19 April 2018
Owing to the utilization of transformation optics, many significant research and development achievements have expanded the applications of illusion devices into thermal fields. However, most of the current studies on relevant thermal illusions used to reshape the thermal fields are dependent of certain pre-designed geometric profiles with complicated conductivity configurations. In this paper, we propose a methodology for designing a new class of thermal source illusion devices for achieving directed thermal diffusions with natural homogeneous media. The employments of the space rotations in the linear transformation processes allow the directed thermal diffusions to be independent of the geometric profiles, and the utilization of natural homogeneous media improve the feasibility. Four schemes, with fewer types of homogeneous media filling the functional regions, are demonstrated in transient states. The expected performances are observed in each scheme. The related performance are analyzed by comparing the thermal distribution characteristics and the illusion effectiveness on the measured lines. The findings obtained in this paper see applications in the development of directed diffusions with minimal thermal loss, used in novel “multi-beam” thermal generation, thermal lenses, solar receivers, and waveguide. View Full-Text
Keywords: thermal diffusion; transformation optics; metamaterial; effective medium theory thermal diffusion; transformation optics; metamaterial; effective medium theory
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MDPI and ACS Style

Xu, G.; Zhang, H.; Jin, L.; Jin, Y. Directed Thermal Diffusions through Metamaterial Source Illusion with Homogeneous Natural Media. Materials 2018, 11, 629.

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