Capillary waves at microdroplet coalescence with a
liquid layer
A.A. Fedorets1,2, I.V. Marchuk2,3, P.A. Strizhak4, and O.A. Kabov3,4
1Tyumen State University, Tyumen, Russia
2Novosibirsk State University, Novosibirsk, Russia
3Kutateladze Institute of ThermophysicsВ SB RAS, Novosibirsk, Russia
4Tomsk Polytechnic University, Tomsk, Russia
E-mail: В marchuk@itp.nsc.ru
Keywords: capillary waves, microdroplets, coalescence, droplet cluster, evaporation, condensation, liquid layer, local heating
Pages: 515–518
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.
DOI: http://dx.doi.org/10.1134/S0869864315040137
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