Numerical study of pin-fin heat sink with un-uniform fin height design

被引:98
作者
Yang, Yue-Tzu [1 ]
Peng, Huan-Sen [1 ]
机构
[1] Natl Cheng Kung Univ, Dept Mech Engn, Tainan 70101, Taiwan
关键词
pin-fin heat sink; un-uniform fin height; electronics cooling; CFD;
D O I
10.1016/j.ijheatmasstransfer.2008.02.017
中图分类号
O414.1 [热力学];
学科分类号
摘要
This study presents the numerical simulation of the heat sink with all un-uniform fill height with a confined impingement cooling. The governing equations are discretized by using a control-volume-based finite-difference method with a power-law scheme oil ail orthogonal non-uniform staggered grid. The coupling of the velocity and the pressure terms of momentum equations are solved by the SIMPLEC algorithm. The well-known k-epsilon two-equations turbulence model is employed to describe the turbulent structure and behavior. The parameters include the Reynolds number (Re = 15,000 and Re = 25,000) and 12 un-uniform fill height designs (Type-b to Type-m). The objective of this study is to examine the effects of the fill shape of the heat sink oil the thermal performance. It is found that the junction temperature call be reduced by increasing the fill height near the center of the heat sink. The results also show that there is a potential for optimizing the un-uniform fill height design. (c) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:4788 / 4796
页数:9
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