存在卡皮察电阻时纳米结构的有效热特性

IF 0.5 4区工程技术 Q4 MECHANICS

Journal of Applied Mechanics and Technical Physics Pub Date : 2024-06-25 DOI:10.1134/S0021894424020159

A. S. Starkov, I. A. Starkov

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引用次数: 0

摘要

研究了固态冷却理论中使用的复合材料的有效热特性。研究考虑了两类复合材料：由大量纳米级层组成的层状结构和两相颗粒状复合材料。假设介质之间的界面是不完美的。Kapitza 温度跃变发生在界面上。利用基质均质化方法获得了层状结构的有效特征。粒状复合材料特性的均质化基于 Bruggeman 方法。计算公式考虑了层间 Kapitza 阻力对结构均质化热特性的影响。得出了热源平均值的表达式。

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Effective Thermal Characteristics of Nanostructures in the Presence of Kapitza Resistance

The effective thermal characteristics of composite materials used in the theory of solidstate cooling are studied. Two classes of composites are considered: layered structures consisting of a large number of nano-sized layers and two-phase granular composites. It is assumed that the interfaces between media are imperfect. The Kapitza temperature jump occurs at the interfaces. The effective characteristics of layered structures are obtained using the matrix homogenization method. The homogenization of the characteristics of granular composites is based on the Bruggeman approach. Formulas taking into account the influence of the interlayer Kapitza resistance on the homogenized thermal characteristics of the structure are obtained. Expressions for average values of heat sources are derived.

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来源期刊

Journal of Applied Mechanics and Technical Physics 物理-力学

CiteScore

1.20

自引率

16.70%

发文量

审稿时长

4-8 weeks

期刊介绍： Journal of Applied Mechanics and Technical Physics is a journal published in collaboration with the Siberian Branch of the Russian Academy of Sciences. The Journal presents papers on fluid mechanics and applied physics. Each issue contains valuable contributions on hypersonic flows; boundary layer theory; turbulence and hydrodynamic stability; free boundary flows; plasma physics; shock waves; explosives and detonation processes; combustion theory; multiphase flows; heat and mass transfer; composite materials and thermal properties of new materials, plasticity, creep, and failure.