Title: Thermal-hydraulic performance of constructal Y-shaped and X-shaped tube heat sinks in laminar flow

Authors: Murat Aydin; Antonio F. Miguel; Devaneyan Solomon Nitesh; Eda Aydin

Addresses: Department of Automotive and Mechatronics Engineering, Ontario Tech University, 2000 Simcoe St N, Oshawa, ON L1G 0C5, Canada ' Department of Physics, University of Évora, Rua Romao Ramalho 59, 7000-672 Évora, Portugal; Institute of Earth Sciences, Pole of Évora, Apartado 94, 7002-554 Evora, Portugal ' Department of Automotive and Mechatronics Engineering, Ontario Tech University, 2000 Simcoe St. N, Oshawa, ON L1G 0C5, Canada ' Student Learning Centre, Ontario Tech University, 2000 Simcoe St. N, Oshawa, ON L1G 0C5, Canada

Abstract: The ability and efficiency to dissipate heat is strongly dependent on the design of heat exchanger. Bifurcating systems are the solutions to fundamental access-maximisation problems. The performance of a forced-air heat sink with single Y-shaped, double Y-shaped and X-shaped configurations of tubes is investigated in this work. A 3-D numerical study is performed at Reynolds numbers (Re) ranging from 5 to 1,500, under a constant heat source. The study mainly focuses effect of the design of tube configurations on both the thermal and hydraulic performances. Among these configurations the optimal thermo-hydraulic performance against Re is determined. The deposition of particles from flowing air on wall of tubes may be detrimental for both thermal and hydraulic performances. The effect of particle size and Re number on deposition rates is also investigated.

Keywords: cooling; heat dissipation; airflow resistance; thermo-hydraulic performance; bifurcating tubes; deposition of particles.

DOI: 10.1504/IJEX.2022.125522

International Journal of Exergy, 2022 Vol.39 No.2, pp.160 - 172

Received: 04 Sep 2021
Accepted: 05 Jan 2022
Published online: 13 Sep 2022 *

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