The Design of Dynamic Thermal Metadevice with Vertical Rotation Coupling Mechanisms for Switchable Effects

Abstract

Recently, thermal metamaterials which can control heat flux at will have attracted many researchers and they can be used in many thermal application scenarios such as thermal concentration and thermal cloak. In this paper, this dynamic thermal metadevice with a vertical rotation coupling component can achieve the target of switchable thermal effect based on effective medium theory and scattering cancellation method. Firstly, this metadvice can adjust the effective thermal conductivities in the region with two novel vertical rotation rings by tuning the rotational velocity. Additionally, an almost undistorted and nonspinning thermal field in the central region can be obtained via this novel design. Furthermore, compared with the previous work, this metadevice can implement the continuous modulation of the effective thermal conductivity at will by adopting a vertical rotation scheme, realizing various thermal functionalities such as thermal concentration and thermal cloak. Then, we demonstrate the switchable effect of this dynamic thermal metadevice in simulations. Meanwhile, the variations of temperature along the measured horizonal line are also shown in simulations. In contrast to previous approaches, this dynamic thermal metadevice may provide more dynamic thermal manipulation inspirations for designing novel multifunctional thermal metadevices.