Experimental investigation of non-uniform heating effect on flow boiling instabilities in a microchannel-based heat sink

被引：61

作者：

Bogojevic, D. ^{[1
]}

Sefiane, K. ^{[1
]}

Walton, A. J. ^{[1
]}

Lin, H. ^{[1
]}

Cummins, G. ^{[1
]}

Kenning, D. B. R. ^{[2
]}

Karayiannis, T. G. ^{[2
]}

机构：

[1] Univ Edinburgh, Sch Engn, Edinburgh EH9 3JL, Midlothian, Scotland

[2] Brunel Univ, Sch Engn & Design, Uxbridge UB8 3PH, Middx, England

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2011年 / 50卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

Microchannels; Flow boiling; Two-phase flow instabilities; Hotspot; Microsensors; PARALLEL MICROCHANNELS; PRESSURE-DROP; WATER;

D O I：

10.1016/j.ijthermalsci.2010.08.006

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Two-phase flow boiling in microchannels is one of the most promising cooling technologies for coping with high heat fluxes produced by the next generation of central processor units (CPUs). If flow boiling is to be used as a thermal management method for high heat flux electronics it is necessary to understand the behaviour of a non-uniform heat distribution, which is typically the case observed in a real operating CPU. The work presented is an experimental study of two-phase boiling in a multi-channel silicon heat sink with non-uniform heating, using water as the cooling liquid. Thin nickel film sensors, integrated on the back side of the heat sinks were used in order to gain insight related to temperature fluctuations caused by two-phase flow instabilities under non-uniform heating. The effect of various hotspot locations on the temperature profile and pressure drop has been investigated. It was observed that boiling inside microchannels with axially non-uniform heating leads to high temperature non-uniformity in the transverse direction. (C) 2010 Elsevier Masson SAS. All rights reserved.

引用

页码：309 / 324

页数：16

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