Effect of tip clearance on the cooling performance of a microchannel heat sink

被引：60
|
作者：
Min, JY [1 ]
Jang, SP [1 ]
Kim, SJ [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Mech Engn, Taejon 305701, South Korea
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2004年 / 47卷 / 05期
关键词：
microchannel heat sink; tip clearance; thermal resistance; pumping power condition;
D O I：
10.1016/j.ijheatmasstransfer.2003.08.020
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In this paper, the effect of tip clearance on the cooling performance of the microchannel heat sink is presented under the fixed pumping power condition. The thermal resistance of a microchannel heat sink is defined for evaluating its cooling performance. The effect of tip clearance is numerically investigated by increasing tip clearance from zero under the fixed pumping power condition. From the numerical results, the optimized tip clearance is determined, for which the thermal resistance has a minimum value. Finally, we show that the presence of tip clearance can improve the cooling performance of a microchannel heat sink when tip clearance is smaller than a channel width. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1099 / 1103
页数：5
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