Design method for nano-film thermal rectifier with asymmetric embedded structure

Abstract

The invention discloses a design method for a nano-film thermal rectifier with an asymmetric embedded structure. The method comprises the steps of embedding a square pyramid frustum-shaped asymmetric embedded structure into a right square prism-shaped nano-film; enabling the height of the asymmetric embedded structure to have gradient change along the thickness direction of the nano-film; establishing an initial molecular structure model; carrying out relaxation on the initial molecular structure model; calculating thermal rectification efficiency of the relaxed molecular structure model; and comparing the rectification efficiency with a preset target thermal rectification efficiency to obtain a structure design parameter of the nano-film thermal rectifier with the asymmetric embedded structure. Thermal characteristics of thermal rectification of the asymmetric embedded structure are combined with ultrathin and regular geometrical characteristics of the nano-film, the thermal rectification performance of the nano-film thermal rectifier is adjusted and controlled through parameter adjustment for the embedded asymmetric structure, and the flexibility and the controllability for design of the thermal rectifier are improved.

Description

technical field [0001] The invention relates to a thermal rectifier, in particular to a design method of a thermal rectifier. Background technique [0002] The so-called thermal rectifier refers to a device that utilizes the phenomenon of different heat flow propagation capabilities in two opposite directions to achieve thermal management functions, and its thermal rectification efficiency is expressed by the difference rate of thermal conductivity in two opposite directions. At present, the implementation forms of thermal rectifiers are roughly divided into two categories: the first type mainly realizes the thermal rectifier by connecting two materials with different heat transfer capabilities in series to form a thermal rectification interface; the second type mainly realizes the thermal rectifier through the heat transfer medium geometry The asymmetry of the structure itself leads to the asymmetry of heat conduction, thus realizing a thermal rectifier. [0003] For the t...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the existing problems of the existing thermal rectifier after the above two forms are realized, and to propose a design method of an asymmetric embedded structure nano-thin film thermal rectifier, which adopts an asymmetric structure embedded in the nano-thin film, Controlling the thermal rectification performance of nano-thin film thermal rectifiers by adjusting the embedded asymmetric structure

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