Transformation Omnithermotics: Simultaneous Manipulation of Three Basic Modes of Heat Transfer

Abstract

Conduction, convection, and radiation are three basic modes of heat transfer which often exist together. However, it is up to now a challenge to simultaneously manipulate them within the framework of transformation theory because they possess diverse properties with different mechanisms. To solve this problem, we develop a transformation theory to control them simultaneously (herein called transformation omnithermotics). With the present theory, we further design three devices including omnithermal cloaking, concentrating, and rotating as model applications. Finite-element simulations and experimental suggestions are also provided to confirm these applications. This work not only unifies the three basic modes of heat transfer within the theoretical framework of transformation omnithermotics, but also provides novel hints and potential applications to thermal management.

Thermal Metamaterial: Fundamental, Application, and Outlook

“…From this point of view, nonlinear transformation thermotics is of essential significance for modulating complex heat transfer beyond linear conduction. More recently, Xu et al synthesized three main modes of heat transfer and gave a framework of transformation omnithermotics (Xu et al, 2020b). This work provides a systematic summary of manipulating three basic modes of heat transport simultaneously.…”

“…More recently, Xu et al. synthesized three main modes of heat transfer and gave a framework of transformation omnithermotics ( Xu et al., 2020b ). This work provides a systematic summary of manipulating three basic modes of heat transport simultaneously.…”

Designing nonlinear thermal devices and metamaterials under the Fourier law: A route to nonlinear thermotics

“…For example, Xu and Huang [203] designed circular/elliptical core-shell structured metamaterials with functions like thermal transparency, cloaking (the shell or cloak can be single-layered or bilayered) and expanding within such a conduction-radiation system. In addition, these methods have been generalized to omnithermotics in which thermal convection is taken into consideration as well as conduction and diffusive radiation [204,205].…”

The Properties and Preparation Methods of Different Boron Nitride Nanostructures and Applications of Related Nanocomposites

“…[189][190][191] The exploration of high thermal conductivity (TC) and electrical insulation (EI) materials is very important. [192,193] The atomicgrade thin BN is a strong candidate for flexible electronic devices due to its wide band gap, high thermal conductivity, excellent strength, good flexibility and ideal thermal and chemical stability. [194] For example, Feng et al [195] reported a simple method to fabricate elastomeric silicon rubber (SiR)/ graphene nanoplatelets (GNPs)/BN composites with a high TC (8.45W • m À 1 K À 1 ) and excellent EI (volume resistance 1012 Ωcm).…”

“…Thermal management has become more and more important, especially in the miniaturized modern equipment [189–191] . The exploration of high thermal conductivity (TC) and electrical insulation (EI) materials is very important [192,193] . The atomic‐grade thin BN is a strong candidate for flexible electronic devices due to its wide band gap, high thermal conductivity, excellent strength, good flexibility and ideal thermal and chemical stability [194] .…”