Heat transfer enhancement in micro-channel with multiple synthetic jets

A. Lee, G. H. Yeoh*, V. Timchenko, J. A. Reizes

*Corresponding author for this work

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

A three-dimensional computational model has been developed to investigate the effect of multiple synthetic jets interaction with cross-flow in micro-channel on the cooling of microchip. Studies were performed with the use of two micro jets being in-phase and 180°out-of-phase at two different operating frequencies and a fixed diaphragm amplitude. The addition of one synthetic jet was shown to achieve greater mixing of flow in the micro-channel than those with single synthetic jet. Greater heat transfer enhancement was achieved with double synthetic jets. Results showed that greater cooling enhancement could be achieved with the out-of-phase flow configuration at oscillating frequency of 560 Hz compared with the in-phase flow configuration. However, the effect of the actuation phase at a frequency of 1120 Hz was found to be insignificant. With double synthetic jet actuators operating out-of-phase, a mere 0.1 K reduction was achieved in maximum silicon temperature compared with in-phase flow jets. The greater the mixing of flow in the micro-channel in either in-phase or out-of-phase flow configuration due to higher jets Reynolds number resulted in the constraint in further cooling enhancement despite having different phases of the flow configuration.

Original languageEnglish
Pages (from-to)275-288
Number of pages14
JournalApplied Thermal Engineering
Volume48
DOIs
Publication statusPublished - 15 Dec 2012
Externally publishedYes

Keywords

  • Conjugate heat transfer
  • Cross-flow
  • Liquid cooling
  • Micro-channel
  • Synthetic jet

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