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ABSTRACT
A three-dimensional numerical simulation of an interrupted microchannel heat sink is performed to investigate the pressure drop and heat transfer characteristics of a nanofluid flow. In the first part the effect of two different rib shapes on flow characteristics is studied to find the optimum design. In this part water is used as working fluid. For the second part of the present work, an Al2O3/water nanofluid with different volume fractions is modeled as the working fluid, and its performance is compared to water. Analysis shows that using ellipse ribs results in better performance of the microchannel rather than diamond ribs and no ribs. It was also shown that at least 2% of nanoparticles volume fraction is required to achieve an enhancement in heat transfer.
Additional information
Notes on contributors
Ayoub Abdollahi
Ayoub Abdollahi is a Ph.D. student in the Department of Mechanical Engineering, the University of Auckland. Currently, he is working on the nanofluid flow and heat transfer in microchannels.
Rajnish N. Sharma
Rajnish N. Sharma is a Senior Lecturer in the Department of Mechanical Engineering, the University of Auckland, specialising in the subject areas of aerodynamics, fluid dynamics, heat Transfer, thermodynamics, and their applications. He currently serves as the Academic Head of the new Thermofluids Laboratory at Newmarket campus.
Hussein A. Mohammed
Hussein A. Mohammed is a Researcher at the Department of Thermofluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Malaysia. He has published on a wide range of inter-disciplinary issues (numerically and experimentally) in aerodynamics, instrumentation development and testing, fundamentals and advanced heat transfer aspects, fluid flow, solar energy, nanotechnology (nanofluids), MEMS and combustion engineering and science. He has published numerous refereed papers in prestigeous international journals.
Ashkan Vatani
Ashkan Vatani is a Ph.D. student in the School of Engineering, Griffith University, Gold Coast Campus, Queensland, Australia. Currently, he is working on the nanofluid flow and heat transfer processes.