Numerical simulation on pore-scale pool boiling mechanisms of horizontal gradient porous metals

被引：7

作者：

Yue, S. J. ^{[1
]}

Xu, Z. G. ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2023年 / 142卷

基金：

中国国家自然科学基金;

关键词：

Horizontal gradient porous metal; Temperature distribution uniformity; Pool boiling; Bubble behavior; LATTICE BOLTZMANN MODEL; HEAT-TRANSFER ENHANCEMENT; COPPER-FOAM; SURFACE; WATER; FLOW; MICROCHANNELS; PERFORMANCE; DYNAMICS; MIXTURE;

D O I：

10.1016/j.icheatmasstransfer.2023.106640

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Horizontal gradient porous metals are proposed to solve the problem of nonuniform temperature distribution on the heating surface. The model of horizontal gradient porous metal is established based on the thermal response of metal skeletons. Pool boiling heat transfer performances of horizontal gradient porous metals are studied by phase-change lattice Boltzmann model. Horizontal porous metal layer thickness, wettability and thermal con-ductivity gradient effects on bubble behavior and heating surface temperature distribution uniformity are sta-tistically analyzed. The results show that porous metals with horizontal thickness gradient can realize liquid -vapor channel separation, reduce the resistance of bubble rising, and improve the fresh liquid supplement. Compared with the uniform porous metal, the horizontal gradient porous metal with lateral hydrophobic surface or higher thermal conductivity has better boiling heat transfer performance and promotes heating surface uni-form temperature distribution at low heat fluxes. The results provide a novel solution to improve the chip wall temperature uniformity for the stable operation of electronic equipment.

引用

页数：11

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