Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Droplets jump at the cluster coalescence with the locally heated liquid layer. / Fedorets, Alexander A.; Gabyshev, Dmitrii N.; Marchuk, Igor V. и др.
в: Interfacial Phenomena and Heat Transfer, Том 8, № 4, 2020, стр. 337-343.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Droplets jump at the cluster coalescence with the locally heated liquid layer
AU - Fedorets, Alexander A.
AU - Gabyshev, Dmitrii N.
AU - Marchuk, Igor V.
AU - Kabov, Oleg A.
N1 - Funding Information: The authors gratefully acknowledge the financial support of the Ministry of Science and Higher Education of the Russian Federation (Project No. AAAA-A20-120051490005-9) and the Federal Agency for Scientific Organizations (Project No. AAAA-A17-117022850022-0). Publisher Copyright: © 2020 by Begell House, Inc. www.begellhouse.com. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2020
Y1 - 2020
N2 - The effect of a droplet ejection upward during the collapse of a droplet cluster is described for the first time. Using a high-speed camera, the dynamics of the droplet motion is studied, based on which the average velocity of the steam– air flow along the droplet trajectory above the locally heated water surface is estimated. It was found that, for the largest observed droplets, the aerodynamic drag force by the Stokes’ law at this average velocity does not exceed their weight. This confirms the fast decay of the flow velocity with the height over the layer. We hypothesize that the thin gas interlayer between the droplet and the evaporating water surface affects the droplet clusters levitation mechanism and ensures the resistance of such droplets to coalescing with the subjacent water layer.
AB - The effect of a droplet ejection upward during the collapse of a droplet cluster is described for the first time. Using a high-speed camera, the dynamics of the droplet motion is studied, based on which the average velocity of the steam– air flow along the droplet trajectory above the locally heated water surface is estimated. It was found that, for the largest observed droplets, the aerodynamic drag force by the Stokes’ law at this average velocity does not exceed their weight. This confirms the fast decay of the flow velocity with the height over the layer. We hypothesize that the thin gas interlayer between the droplet and the evaporating water surface affects the droplet clusters levitation mechanism and ensures the resistance of such droplets to coalescing with the subjacent water layer.
KW - Air–water interface
KW - Capillary wave
KW - Coalescence
KW - Convective flow
KW - Droplet cluster
KW - Jumping droplet
UR - http://www.scopus.com/inward/record.url?scp=85099151939&partnerID=8YFLogxK
U2 - 10.1615/InterfacPhenomHeatTransfer.2020037059
DO - 10.1615/InterfacPhenomHeatTransfer.2020037059
M3 - Article
AN - SCOPUS:85099151939
VL - 8
SP - 337
EP - 343
JO - Interfacial Phenomena and Heat Transfer
JF - Interfacial Phenomena and Heat Transfer
SN - 2169-2785
IS - 4
ER -
ID: 27415833