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Indexed by:期刊论文

Date of Publication:2017-01-01

Journal:EXPERIMENTAL THERMAL AND FLUID SCIENCE

Included Journals:SCIE、EI

Volume:80

Page Number:155-167

ISSN No.:0894-1777

Key Words:Piston; Cooling gallery; Nanofluid; Reciprocating motion; Visualization

Abstract:In the current work, a high-speed camera was employed to capture the flow patterns of nanofluids inside a simplified piston gallery at various crank angles. The heat transfer mechanisms of gas-liquid-solid three-phase flow (air, base fluid, and nanoparticles) during reciprocating motion was explored. The effects of oscillation frequency, nanofluid filling ratio, and nanoparticle concentration were also discussed. The addition of nanoparticles into a base fluid enhances the heat and mass transfer processes effectively. Of all the three determining factors of the flow field during the reciprocating motion, the oscillation frequency plays a major role, the nanoparticle concentration plays a minor role and the nanofluid filling ratio lies in between. (C) 2016 Elsevier Inc. All rights reserved.