Formation of thermocapillary structures in a heated liquid film
S.P. Aktershev, E.N. Shatskiy, and
E.A. Chinnov
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Novosibirsk State University, Novosibirsk, Russia
E-mail: sergey-aktershev@mail.ru
Keywords: heated film, thermocapillary instability, rivulet structures
Pages: 739–749
Abstract
The conditions of
formation of a three-dimensional thermocapillary structure on the surface of a
liquid film flowing along a heater with the constant temperature were studied
numerically based on the derived system of equations. Formation of the
thermocapillary structure was modeled by periodic perturbations in the
transverse direction superimposed on the two-dimensional flow. It is shown in
calculations that transversal perturbations can develop into periodic rivulet
structures on the film surface if the Marangoni number exceeds some threshold
value. It is revealed that the rivulet structure develops when the period
belongs to a certain range, which is determined by the value of Marangoni
number. The results of calculations are in a good agreement with experimental
data.
DOI: 10.1134/S0869864317050092
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