Optimization of Dimples in Microchannel Heat Sink with Impinging Jets—Part B: the Influences of Dimple Height and Arrangement

TitleOptimization of Dimples in Microchannel Heat Sink with Impinging Jets—Part B: the Influences of Dimple Height and Arrangement
Publication TypeJournal Article
Year of Publication2018
AuthorsTingzhen Ming, Cunjin Cai, Wei Yang, Wenqing Shen, Wei Feng, Nan Zhou
JournalJournal of Thermal Science
Volume27
Issue4
Pagination321 - 330
Date Published08/2018
ISSN1003-2169
Keywordsdimple, heat transfer enhancement, impinging jet, microchannel with impinging jets and dimples, Thermal resistance
Abstract

The combination of a microchannel heat sink with impinging jets and dimples (MHSIJD) can effectively improve the flow and heat transfer performance on the cooling surface of electronic devices with very high heat fluxes. Based on the previous work by analysing the effect of dimple radius on the overall performance of MHSIJD, the effects of dimple height and arrangement were numerically analysed. The velocity distribution, pressure drop, and thermal performance of MHSIJD under various dimple heights and arrangements were presented. The results showed that: MHSIJD with higher dimples had better overall performance with dimple radius being fixed; creating a mismatch between the impinging hole and dimple can solve the issue caused by the drift phenomenon; the mismatch between the impinging hole and dimple did not exhibit better overall performance than a well-matched design.

DOI10.1007/s11630-018-1019-y
Short TitleJ. Therm. Sci.