Beijing Institute of Spacecraft Environment Engineering, Beijing, 100094, China.
Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an, 710129, China.
Sci Rep. 2017 Aug 8;7(1):7541. doi: 10.1038/s41598-017-07902-5.
Thermal metamaterials, proposed in recent years, provide a new method to manipulate the energy flux in heat transfer, and result in many novel thermal devices. In this paper, an illusion thermal device for location camouflage in 3-dimensional heat conduction regime is proposed based on the transformation thermodynamics. The heat source covered by the device produces a fake signal outside the device, which makes the source look like appearing at another position away from its real position. The parameters required by the device are deduced and the method is validated by simulations. The possible scheme to obtain the thermal conductivities required in the device by composing natural materials is supplied, and the influence of some problems in practical fabrication process of the device on the effect of the camouflage is also discussed.
热超材料是近年来提出的一种用于操控热传递中能量流的新方法，可实现许多新颖的热功能器件。本文基于变换热力学提出了一种用于三维热传导环境下位置伪装的幻象热器件。该器件覆盖热源，在器件外部产生虚假信号，使得热源看起来出现在远离其真实位置的另一位置。推导了器件所需的参数，并通过模拟进行了验证。给出了通过组合天然材料获得器件所需热导率的可能方案，并讨论了器件实际制造过程中的一些问题对伪装效果的影响。
