Heat and Mass Transfer Processes and Evaporation of a Liquid Droplet on a Structured Surface; Energies; Vol. 16, iss. 22

Heat and Mass Transfer Processes and Evaporation of a Liquid Droplet on a Structured Surface

Bibliografiske detaljer
Parent link:Energies.— .— Basel: MDPI AG
Vol. 16, iss. 22.— 2023.— Article number 7505, 22 p.
Hovedforfatter: Antonov D. V. Dmitry Vladimirovich
Institution som forfatter: National Research Tomsk Polytechnic University (570)
Andre forfattere: Islamova A. G. Anastasiya Gomilievna, Orlova E. G. Evgeniya Georgievna
Summary:Title screen
The characteristics of water droplet heating and evaporation on structured hydrophobic and hydrophilic surfaces in the range of static contact angles from 73° to 155° were studied experimentally using high-speed video recording. Two fundamentally different technologies for applying coatings on a metal surface were used in comparison with the results on a polished surface. Microscopic studies were conducted to identify the features of the formed coatings. The wetting properties were characterized by means of the static contact angle and the contact angle hysteresis: on polished surface No. 1 (contact angle—73°, hysteresis—11°), on structured surface No. 2 (contact angle—125°, hysteresis—9°), and on structured surface No 3 (contact angle—155°, hysteresis—7°). The experimental dependences of the droplet evaporation rate on the different surfaces under normal conditions (ambient air temperature—293 K, atmospheric pressure, humidity—35%) were obtained. The evaporation regimes of droplets on the surfaces under study were identified. Water droplets evaporated in the pinning mode on surfaces No. 1 and No. 2. When a water droplet evaporated on surface No 3, the droplet was in the constant contact angle regime for ≈90% of its lifetime. Based on the experimental data obtained, a two-dimensional model of conjugate heat and mass transfer was developed, which describes the heating and evaporation of a liquid droplet on structured hydrophobic and hydrophilic surfaces at a wide range of contact angles. Satisfactory agreement was obtained between the numerical simulation results and experimental data. Using the model, the fields of temperature, concentration and other key characteristics were established at different points in time. Recommendations for its application in the development of gas–vapor–droplet applications were formulated
Текстовый файл
Sprog:engelsk
Udgivet: 2023
Fag:
электронный ресурс
труды учёных ТПУ
hydrophobic surfaces
hydrophilic surfaces
superhydrophobic surfaces
liquid droplet
conjugate heat and mass transfer
evaporation
model
Online adgang:https://doi.org/10.3390/en16227505
Format: Electronisk Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=673852

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