Thermocapillary instability and rivulet structure formation in uniformly heated falling liquid film : научное издание

Описание

Тип публикации: статья из журнала

Год издания: 2019

Идентификатор DOI: 10.1016/j.ijmultiphaseflow.2019.02.007

Ключевые слова: heated liquid film, numerical simulation, rivulet, thermocapillary instability

Аннотация: A system of equations is derived to describe the nonstationary three-dimensional flow of non-isothermal liquid film in the presence of thermocapillary effect in long-wave approximation. The developed model is applicable for moderate Reynolds numbers and does not imply an a priori temperature profile in the film. Based on the deriveПоказать полностьюd equations the stability of a uniformly heated vertically falling liquid film is considered relative to spanwise perturbations. The linear analysis of the flow stability is carried out, and the dispersion dependences are obtained. A numerical method is used to study the nonlinear development of instabilities in 2D and 3D statements. It is shown that in a 3D statement, a small transverse perturbation evolves into the time-independent rivulet structure. The influence of dimensionless criteria of the problem on characteristic time and spatial scales of instability development and parameters of rivulet structures has been revealed.

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Издание

Журнал: International Journal of Multiphase Flow

Номера страниц: 115-127

ISSN журнала: 03019322

Издатель: Elsevier Science Publishing Company, Inc.

Авторы

  • Aktershev S.P. (Kutateladze Institute of Thermophysics)
  • Alekseenko S.V. (National Research Tomsk Polytechnic University)

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