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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 1.4

ISSN Imprimer: 1940-2503
ISSN En ligne: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2017019601
pages 549-565

COMPARATIVE STUDY OF FLUID FLOW AND HEAT TRANSFER IN RECTANGULAR AND WAVY MICROCHANNEL

Satish Kumar Dewangan
NIT Raipur (CG) - INDIA
Shobha Lata Sinha
Mechanical Engineering Department, National Institute of Technology–Raipur (CG), India 492010
Prateek Kumar Gupta
Mechanical Engineering Department, National Institute of Technology–Raipur (CG), India 492010

RÉSUMÉ

A comparative study of steady, laminar, single-phase flow of nanofluid through a rectangular microchannel and wavy microchannel heat exchanger of equal dimensions has been carried out. The effect on three important variables (i.e., heat transfer coefficient, pumping power, and friction factor) have been analyzed by considering the effect of four parameters (i.e., effect of flow rate, effect of nanofluid concentration, effect of amplitude of wavy surface, and effect of wave length of wavy surfaces). Numerical simulation has been validated with the experimental work of Lee and Mudawar (Lee, J. and Mudawar, I., Assessment of the effectiveness of nanofluids for single and multiphase heat transfer in micro channel, Int. J. Heat Mass Transfer, vol. 50, pp. 452–463, 2007). It is concluded that, with an increase in the amplitude of a wavy surface, the heat transfer coefficient increases. Results show that the wavy channel performed better than the plane rectangular microchannel in terms of the rise in heat transfer coefficient but is costly due to the pump power requirement.


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