Publication Cover
Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 85, 2024 - Issue 13
148
Views
3
CrossRef citations to date
0
Altmetric
Articles

A comprehensive analysis of a rectangular microchannel heat sink furnished with a circular perforated cylindrical pinfin

, ORCID Icon, &
Pages 2128-2144 | Received 29 Dec 2022, Accepted 19 May 2023, Published online: 05 Jun 2023
 

Abstract

In this study, a simulation has been performed to investigate the effect of circular perforated pinfins on the performance of microchannel heat sink by varying the number of holes and their locations on the pinfins. A total of ten configurations are considered in this work including a plain microchannel (without pinfin) and a solid pinfin case. The study was conducted on a single-phase flow using deionized water as coolant and the Reynolds numbers range from 150 to 350 when a constant heat flux of 100W/cm2 has been applied at the heated base wall of a heat sink. The results obtained indicate that the location, as well as the number of perforations, affects the heat transfer capacity and pressure drop that occurs in the microchannel. However, the outcomes of the present analysis contradict the findings for thermal airflows when identical cases have been applied to the micro heatsink. According to the present analysis case 1 (perforation at the underside of the pinfin) has the maximum Nusselt number followed by case 2 (perforation at the mid of the pinfin) and case 3 (perforation at the topside of the pinfin) whereas the minimum pressure drop is achieved by case 8 (four equidistant perforations) among pinfin configurations. The highest performance factor is achieved by case 1 at a low Reynolds number while case 6 (perforation at the underside and topside) performs best at a higher Reynolds number.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.