CFD analysis of thermal performance of microchannel nanofluid flow at different Reynolds numbers
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Creator 1. Arjun Kozhikkatil Sunil
2. Rakesh Kumar
Title CFD analysis of thermal performance of microchannel nanofluid flow at different Reynolds numbers
Publisher Research and Development Office, Prince of Songkla University
Publication Year 2019
Journal Title Songklanakarin Journal of Science and Technology
Journal Vol. 41
Journal No. 1
Page no. 109-116
Keyword circular microchannels, alumina-water nanofluids, computational fluid dynamics, heat transfer coefficient, pressure drop
URL Website http://rdo.psu.ac.th/sjstweb/index.php
ISSN 0125-3395
Abstract Convective heat transfer and pressure drop using alumina-water nanofluid under laminar and turbulent flow regimes using the viscous laminar model and standard k-? model have been studied. A circular microchannel heat exchanger (0.1 m long and 0.5 mm inner diameter) with constant wall temperatures, and 0 to 5% Al2O3-water nanofluid flowing inside and cold water flowing outside was used. This experiment showed that convection heat transfer increased remarkably with the increase of nanoparticle concentration under various values of Reynolds numbers. The heat transfer coefficient increased 15% compared to pure water under 5% volume concentration for the laminar regime and 12% for the turbulent zone (Nusselt number decreased about 2.5%). The pressure drop of the nanofluid increased as the volume concentration increased. However, compared with pure water, the change in pressure drop was significant. Therefore, the use of a nanofluid has a great penalty on pressure drop.
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