Confinement effects on nucleate boiling and critical heat flux in buoyancy-driven microchannels

被引：32

作者：

Geisler, K. J. L. ^{[1
]}

Bar-Cohen, A. ^{[2
]}

机构：

[1] Gen Dynam Adv Informat Syst, Bloomington, MN 55431 USA

[2] Univ Maryland, Dept Mech Engn, College Pk, MD 20742 USA

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2009年 / 52卷 / 11-12期

关键词：

Boiling; Microchannel; Confinement; Electronics cooling; Heat transfer; VERTICAL CHANNELS; NARROW SPACE; SURFACES; PRESSURE;

D O I：

10.1016/j.ijheatmasstransfer.2009.02.001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Pool boiling and CHF experiments were performed for vertical, rectangular parallel-plate channels immersed in the dielectric liquid FC-72 at atmospheric pressure to elucidate the effects of geometrical confinement in immersion cooled electronics applications. Heat transfer enhancement in the low flux region of the nucleate boiling curve was observed for channel spacings near and below expected bubble departure diameters, but was widely different for two different heater materials. Relative degradation of CHF with decreasing channel spacing was found to be a strong function of channel aspect ratio and independent of surface material and finish. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2427 / 2436

页数：10

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