The effect of metal surface roughness on the characteristics of sessile droplet evaporation: Experimental data and numerical simulation; Physics of Fluids; Vol. 37, iss. 6

The effect of metal surface roughness on the characteristics of sessile droplet evaporation: Experimental data and numerical simulation

Dettagli Bibliografici
Parent link:Physics of Fluids.— .— New York: AIP Publishing
Vol. 37, iss. 6.— 2025.— Article number 062106, 24 p.
Altri autori: Antonov D. V. Dmitry Vladimirovich, Islamova A. G. Anastasiya Gomilievna, Nigay A. G. Aleksandr Gerasimovich, Slusarskiy (Slyusarsky) K. V. Konstantin Vitalievich, Strizhak P. A. Pavel Alexandrovich
Riassunto:Title screen
The integral characteristics of heating and evaporation of water droplets placed on different steel plates were studied. Seven samples of steel plates with different roughness (root mean square height from 0.05 to 0.38 μm) and wettability (from 71.6° to 89.1°) were produced by processing with an abrasive material with an average grain size ranging from 1 to 160 μm and studied. The droplet volume and surface temperature were constant and equal to 10 μl and 100 °C, respectively. The geometric characteristics of the evaporating droplet were determined using the shadow images of the droplets. Three droplet evaporation modes were distinguished: spreading, fixing of the three-phase contact line, and mixed. Based on the experimental results, a hypothesis was formulated, that the conditions for the transition between the modes during evaporation were affected by the wettability properties of the surface and its roughness in a narrow range of values. Also, the functional relationships between sliding velocity and surface morphology were identified and considered in simulation via empirical coefficients. They had become fundamental for a mathematical model of conjugate heat and mass transfer of a water droplet on a surface, which differs from the known ones by taking into account the roughness and wettability of the surface with contact angles varying in wide ranges (from hydrophilic to hydrophobic). Using this model, numerical research on heating and evaporation of water droplets on abrasively processed steel surfaces was performed. The effect of variation of initial water volumes (from 0.001 to 10 μl) and the temperature of the rough surface (from 20 to 100 °C) was investigated. The dependences were obtained, which describe the functional relationships between input and output parameters for predictive assessments of heat transfer characteristics of similar processes
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AM_Agreement
Lingua:inglese
Pubblicazione: 2025
Soggetti:
электронный ресурс
труды учёных ТПУ
Accesso online:https://doi.org/10.1063/5.0263369
Natura: Elettronico Capitolo di libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=681309

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