Flow visualization and study of critical heat flux enhancement in pool boiling with Al2O3-water nanofluids
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Date
2012
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Journal Title
Journal ISSN
Volume Title
Publisher
Serbian Society of Heat Transfer Engineers
Abstract
Pool boiling heat transfer characteristics of Al<inf>2</inf>O<inf>3</inf> -water nanofluids is studied experimentally using a NiCr test wire of 36 standard wire guage diameter. The experimental work mainly concentrated on (1) change of critical heat flux with different volume concentrations of nanofluid and (2) flow visualization of pool boiling using a fixed concentration of nanofluid at different heat flux values. The experimental work revealed an increase in critical heat flux value of around 48% andflow visualization helped in studying the pool boiling behaviour of nanofluid.Out of the various reasons which could affect the critical heatflux enhancement, surface roughness plays a major role in pool boiling heat transfer.
Description
Keywords
Alumina, Aluminum oxide, Binary alloys, Chromium alloys, Flow visualization, Heat transfer, Nanofluidics, Surface roughness, Flow studies, Flow visualisation, Flux enhancement, Heat-transfer characteristics, Nanofluids, Pool boiling, Pool boiling heat transfer, Test wires, Volume concentration, Water nanofluids, Heat flux
Citation
Thermal Science, 2012, 16, 2, pp. 445-453