Entransy evaluation model for transmission characteristic of thermal cloak metamaterial

Thermal cloak as one of thermal stealth metamaterial is applied to various fields such as the aerospace craft, satellite and computer chip, with its extraordinary physical properties. In this paper, based on the multilayer metamaterial structure using copper and PDMS materials, two kinds of thermal cloak shape were designed as fusiform and missile. Numerical simulations were carried out using FLUENT14.5 software, to calculate the heat transfer thermal cloak models of different shapes. To evaluate thermal stealth ability, thermal stealth rate was proposed based on entransy dissipative extreme value theories. Then the thermodynamic performance of the optima models were discussed under different conditions, using thermal stealth rate, which provided a frame of reference on application widely.