Numerically Investigating the Effects of Cross-Links in Scaled Microchannel Heat Sinks

Minh Dang, Ibrahim Hassan, Sung In Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Thermal management as a method of heightening performance in miniaturized electronic devices using microchannel heat sinks has recently become of interest to researchers and the industry. One of the current challenges is to design heat sinks with uniform flow distribution. A number of experimental studies have been conducted to seek appropriate designs for microchannel heat sinks. However, pursuing this goal experimentally can be an expensive endeavor. The present work investigates the effect of cross-links on adiabatic two-phase flow in an array of parallel channels. It is carried out using the three dimensional mixture model from the computational fluid dynamics software, FLUENT 6.3. A straight channel and two cross-linked channel models were simulated. The cross-links were located at 1/3 and 2/3 of the channel length, and their widths were one and two times larger than the channel width. All test models had 45 parallel rectangular channels, with a hydraulic diameter of 1.59 mm. The results showed that the trend of flow distribution agrees with experimental results. A new design, with cross-links incorporated, was proposed and the results showed a significant improvement of up to 55% on flow distribution compared with the standard straight channel configuration without a penalty in the pressure drop. Further discussion about the effect of cross-links on flow distribution, flow structure, and pressure drop was also documented.
Original languageEnglish
Article number121103
Number of pages13
JournalJournal of Fluids Engineering
Volume130
Issue number12
Early online date23 Oct 2008
DOIs
Publication statusPublished - 01 Dec 2008

Keywords

  • two-phase flow
  • cross-links
  • CFD
  • flow distribution
  • microchannel heat sinks

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