Capillary waves at microdroplet coalescence with a liquid layer

Abstract

The quickly damped capillary waves generated at coalescence of microdroplets (diameter of up to 100 µm), formed in a gas atmosphere at water vapor condensation, with the horizontal layer of water are studied experimentally. Evaporation takes place at intensive local heating of liquid from the substrate side. To visualize and measure the deformations, the Schlieren technique and high-speed video (up to 54000 f/s) are applied. The measured wave amplitude varies within 1-6 μm, and this is consistent with the magnitude of the surface energy of coalescing microdroplets. The waves are generated by the energy of droplet surface.

Original language	English
Pages (from-to)	515-518
Number of pages	4
Journal	Thermophysics and Aeromechanics
Volume	22
Issue number	4
DOIs	https://doi.org/10.1134/S0869864315040137
Publication status	Published - 1 Jul 2015

Keywords

capillary waves
coalescence
condensation
droplet cluster
evaporation
liquid layer
local heating
microdroplets

ASJC Scopus subject areas

Nuclear and High Energy Physics
Radiation

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10.1134/S0869864315040137

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title = "Capillary waves at microdroplet coalescence with a liquid layer",

abstract = "The quickly damped capillary waves generated at coalescence of microdroplets (diameter of up to 100 µm), formed in a gas atmosphere at water vapor condensation, with the horizontal layer of water are studied experimentally. Evaporation takes place at intensive local heating of liquid from the substrate side. To visualize and measure the deformations, the Schlieren technique and high-speed video (up to 54000 f/s) are applied. The measured wave amplitude varies within 1-6 μm, and this is consistent with the magnitude of the surface energy of coalescing microdroplets. The waves are generated by the energy of droplet surface.",

keywords = "capillary waves, coalescence, condensation, droplet cluster, evaporation, liquid layer, local heating, microdroplets",

author = "Fedorets, {A. A.} and Marchuk, {I. V.} and Strizhak, {P. A.} and Kabov, {O. A.}",

year = "2015",

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language = "English",

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T1 - Capillary waves at microdroplet coalescence with a liquid layer

AU - Fedorets, A. A.

AU - Marchuk, I. V.

AU - Strizhak, P. A.

AU - Kabov, O. A.

PY - 2015/7/1

Y1 - 2015/7/1

N2 - The quickly damped capillary waves generated at coalescence of microdroplets (diameter of up to 100 µm), formed in a gas atmosphere at water vapor condensation, with the horizontal layer of water are studied experimentally. Evaporation takes place at intensive local heating of liquid from the substrate side. To visualize and measure the deformations, the Schlieren technique and high-speed video (up to 54000 f/s) are applied. The measured wave amplitude varies within 1-6 μm, and this is consistent with the magnitude of the surface energy of coalescing microdroplets. The waves are generated by the energy of droplet surface.

AB - The quickly damped capillary waves generated at coalescence of microdroplets (diameter of up to 100 µm), formed in a gas atmosphere at water vapor condensation, with the horizontal layer of water are studied experimentally. Evaporation takes place at intensive local heating of liquid from the substrate side. To visualize and measure the deformations, the Schlieren technique and high-speed video (up to 54000 f/s) are applied. The measured wave amplitude varies within 1-6 μm, and this is consistent with the magnitude of the surface energy of coalescing microdroplets. The waves are generated by the energy of droplet surface.

KW - capillary waves

KW - coalescence

KW - condensation

KW - droplet cluster

KW - evaporation

KW - liquid layer

KW - local heating

KW - microdroplets

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