Design and Performance Evaluation of Constructal Microchannel Network Heatsinks

[+] Author and Article Information
Alan Lugarini

Federal University of Technology − Paraná, Research Center for Rheology and Non-Newtonian Fluids

Admilson T. Franco

Professor, Federal University of Technology − Paraná, Department of Mechanical Engineering, Research Center for Rheology and Non-Newtonian Fluids

Marcelo Risso Errera

Professor, Federal University of Paraná, Environmental Engineering Department

1Corresponding author.

ASME doi:10.1115/1.4038559 History: Received May 30, 2017; Revised October 16, 2017


This work presents the development and analysis of constructal microchannel network architectures for heat dissipation. The network configurations are characterized by multiple flow ramifications and changes in length and hydraulic diameter scales through each ramification level. Architectures investigated experimentally in the past years have constant scaling rules throughout their ramification levels. In this study constructal theory inspires the design of network architectures with variable scaling rules and up to three ramification levels. As result, it was verified that constructal networks allow significant pumping power reduction with respect to networks with same ramification levels. Architecture's selection criteria using performance curves is proposed and it was demonstrated that the bifurcated network with diameter ratio according to Hess-Murray law is not appropriated for heat dissipation purposes in miniaturized devices.

Copyright (c) 2017 by ASME
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