THERMAL SCIENCE

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Liping Wei

,

Youjun Lu

,

Jinjia Wei

MIXED CONVECTION HEAT TRANSFER FROM A PARTICLE IN SUPERCRITICAL WATER

ABSTRACT
This paper aims to study a steady laminar convection flow over a spherical particle in supercritical water in pseudo-critical zone. Forced convection, free convection, assisting convection, and opposing convection from a spherical particle in supercritical water (SCW) were studied based on a numerical model fully accounting for variations of thermo-physical properties in pseudo-critical zone. Variation of specific heat plays a main role in determination of heat transfer coefficient. The gravity direction has a remarkable effect on heat transfer. Quantitative relationship between variable properties and Nusselt number has been established based on the simulation results.
KEYWORDS
heat transfer, spherical particle, mixed convection, supercritical water
PAPER SUBMITTED: 2013-11-03
PAPER REVISED: 2014-01-20
PAPER ACCEPTED: 2014-03-03
PUBLISHED ONLINE: 2014-04-05
DOI REFERENCE: https://doi.org/10.2298/TSCI131103038W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Issue 2, PAGES [483 - 492]
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Mixed convection heat transfer from a particle in supercritical water

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