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research-article

A new approach for the mitigating of flow maldistribution in parallel microchannel heat sink

[+] Author and Article Information
Ritunesh Kumar

Mechanical Engineering Department, Indian Institute of Technology Indore, Khandwa Road, Simrol, India-453552
ritunesh@iiti.ac.in

Gurjeet Singh

Mechanical Engineering Department, Indian Institute of Technology Indore, Khandwa Road, Simrol, India-453552
phd1401103004@iiti.ac.in

Dariusz Mikielewicz

Gdansk University of Technology, Faculty of Mechanical Engineering, ul. Narutowicza 11/12, 80-233 Gdansk, Poland
dmikiele@pg.gda.pl

1Corresponding author.

ASME doi:10.1115/1.4038830 History: Received June 05, 2017; Revised November 14, 2017

Abstract

The problem of flow maldistribution is very critical in microchannel heat sinks (MCHS). It induces temperature non-uniformity, which may ultimately lead to the breakdown of associated system. In the present communication, a novel approach for the mitigation of flow maldistribution problem in parallel MCHS has been proposed using variable width microchannels. Numerical simulation of copper made parallel microchannel heat sink consisting of twenty five channels has been carried out for the conventional design (CD) and the proposed design (PD). It is observed that the proposed design contributed to reduction of flow maldistribution by 93.7%, which facilitated in effective uniform cooling across the entire projected area of MCHS. Temperature fluctuation at fluid - solid interface is reduced by 4.3ºC whereas, maximum and average temperatures of microchannels projected area are reduced by 2.3ºC and 1.1ºC respectively. Proposed design is suitable in alleviating flow maldistribution problem for the extended range of off design conditions.

Copyright (c) 2017 by ASME
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