THERMAL SCIENCE

International Scientific Journal

EFFECT OF SURFACE MICROMORPHOLOGY AND HYDROPHOBICITY ON CONDENSATION EFFICIENCY OF DROPLETS USING THE LATTICE BOLTZMANN METHOD

ABSTRACT
In the present study, the effects of the surface morphology and surface hydrophobicity on droplet dynamics and condensation efficiency are investigated using the lattice Boltzmann method. Different surface morphologies may have different condensation heat transfer efficiencies, resulting in diverse condensation rates under the same conditions. The obtained results show that among the studied morphologies, the highest condensation rate can be achieved for conical micro-structures followed by the triangle micro-structure, and the columnar micro-structure has the lowest condensation rate. Moreover, it is found that when the surface micro-structure spacing is smaller and the surface micro-structure is denser, the condensation heat transfer between the surface structure and water vapor facilitates, thereby increasing the condensation efficiency of droplets. Furthermore, the condensation process of droplets is associated with the surface hydrophobicity. The more hydrophobic the surface, the more difficult the condensation heat transfer and the longer the required time for droplet nucleation. Meanwhile, a more hydrophobic surface means that it is harder for droplets to gather and merge, and the corresponding droplet condensation rate is also lower.
KEYWORDS
PAPER SUBMITTED: 2021-05-06
PAPER REVISED: 1970-01-01
PAPER ACCEPTED: 2021-07-17
PUBLISHED ONLINE: 2021-10-10
DOI REFERENCE: https://doi.org/10.2298/TSCI210506287L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 4, PAGES [3505 - 3515]
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© 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