THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Xiaohong Gui

,

Xiange Song

,

Baisheng Nie

THERMAL ANALYSIS IN THIN-FILM FLUID REGIONS OF RECTANGULAR MICROGROOVE

ABSTRACT
The effects of contact angle and superheat on thin film thickness and heat flux distribution occurring in a rectangle microgroove are numerically simulated. Accordingly, physical and mathematical models are built in detail. Numerical results indicate that meniscus radius and thin film thickness increase with the improvement of contact angle. The heat flux distribution in the thin film region increases nonlinearly as the contact angle decreases. The total heat transfer through the thin film region increases with the improvement of superheat, and decreases as the contact angle increases. When the contact angle is equal to zero, the heat transfer in the thin film region accounts for more than 80% of the total heat transfer. Intensive evaporation in the thin film region plays a key role in heat transfer for the rectangle capillary microgroove. The liquid with higher wetting performance is more capable of playing the advantages of higher intensity heat transfer in thin film region. The current investigation will result in a better understanding of thin film evaporation and its effect on the effective thermal conductivity in the rectangle microgroove.
KEYWORDS
contact angle, film thickness, heat flux distribution, rectangle microgroove
PAPER SUBMITTED: 2016-01-14
PAPER REVISED: 2016-10-20
PAPER ACCEPTED: 2016-10-25
PUBLISHED ONLINE: 2016-12-03
DOI REFERENCE: https://doi.org/10.2298/TSCI160114288G
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Issue 2, PAGES [899 - 907]
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Thermal analysis in thin-film fluid regions of rectangular microgroove

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence