0
Technical Briefs

A Numerical Study of a Heat Sink Fin Under a Laminar Impinging Jet

[+] Author and Article Information
Z. Q. Lou

Thermal Lab 2, Department of Mechanical Engineering, National University of Singapore, Singapore 119260, Singaporezhengquanlou@nus.edu.sg

C. Yap, A. S. Mujumdar

Thermal Lab 2, Department of Mechanical Engineering, National University of Singapore, Singapore 119260, Singapore

J. Electron. Packag 130(3), 034501 (Aug 08, 2008) (5 pages) doi:10.1115/1.2809447 History: Received August 30, 2005; Revised April 28, 2007; Published August 08, 2008

Impinging jet heat transfer is a promising method to cool electronic components. In this paper, a numerical study has been carried out to examine the conjugate heat transfer under a confined impinging jet using a plate-fin heat sink as the target plate. Effects of geometric parameters such as fin number, fin height, and fin-to-spacing ratio are examined over a range of jet Reynolds numbers using dielectric fluid FC-72 as the fluid medium. Thermal resistance, pressure drop, and Nusselt number are the main criteria used to evaluate the thermal and fluid dynamic performance of this flow system. Furthermore, the effects of fin height, fin-to-spacing ratio, and jet Reynolds number on impinging jet heat transfer are obtained. The concept of an effective Nusselt number is introduced for computing the heat transfer effectiveness of heat sinks with different fin numbers.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Configuration of the impinging jet heat transfer system with a plate-fin heat sink

Grahic Jump Location
Figure 2

Mesh generation of the computational domain for half a fin and spacing

Grahic Jump Location
Figure 3

Relationship between the effective Nusselt number and number of fins

Grahic Jump Location
Figure 4

Relationship between the thermal resistance and fin number for air and FC-72

Grahic Jump Location
Figure 5

Effects of fin height on the sink-to-ambient thermal resistance by Maveety and Jung (1)

Grahic Jump Location
Figure 6

Relationship between thermal resistance and jet Reynolds number for various fin heights

Grahic Jump Location
Figure 7

Relationship between pressure drop and jet Reynolds number for various fin heights

Grahic Jump Location
Figure 8

Relationship between pressure drop and jet Reynolds number for various fin-to-spacing ratios

Grahic Jump Location
Figure 9

Relationship between thermal resistance, fin-to-spacing ratio, and jet Reynolds number

Grahic Jump Location
Figure 10

Comparison of thermal resistances between FC-72 and air for various jet Reynolds numbers

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In