THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Qiang Huang

,

Jingzhi Zhou

,

Xiulan Huai

,

Feng Zhou

ENHANCING POOL BOILING HEAT TRANSFER OF MODIFIED SURFACE BY 3-D LATTICE BOLTZMANN METHOD

ABSTRACT
In this study, pool boiling from micro-pillar modified surface has been simulated numerically by a 3-D lattice Boltzmann method. Effects of geometries and wettability of micro-pillar on boiling heat transfer performance were also systematically evaluated. Result showed that compared within micro-pillar surface, heat flux of cubic micro-pillar surface was the highest with the lowest wall temperature. In addition, compared to hydrophilic condition, Heat flux of cubic micro-pillar surface with hydrophobic wettability increased by 98.3%. This is because hydrophobic wettability influenced nucleation site density, vapor-liquid-flow field and heat transfer performance much more than cubic shaped geometry. Finally, heat flux of cubic micro-pillar surface with hybrid wettability increased by 430.7% compared to pure hydrophilic wettability. That is due to optimal hybrid wettability surface could control nucleate site location, restrict bubble growth, and increase obviously heat transfer performance.
KEYWORDS
3D LBM, pool boiling, Micro-pillar, Geometry, wettability
PAPER SUBMITTED: 2023-01-14
PAPER REVISED: 2023-04-17
PAPER ACCEPTED: 2023-04-17
PUBLISHED ONLINE: 2023-06-11
DOI REFERENCE: https://doi.org/10.2298/TSCI230114121H
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 1, PAGES [133 - 146]
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Enhancing pool boiling heat transfer of modified surface by 3-D Lattice Boltzmann method

© 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