Investigating waves on the surface of a thin liquid film entrained by a turbulent gas flow: modeling beyond the “quasi-laminar” approximation

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Abstract

The problem of the joint flow of a turbulent gas stream and a vertically falling wavy liquid film is considered. Tangential and normal stresses on the interfaces are calculated. The components of the Reynolds stress tensor are determined within the framework of the Boussinesq hypothesis. For the case of small Reynolds numbers of a liquid, the problem is reduced to a nonlinear integro-differential equation for the deviation of the layer thickness from the unperturbed level. A numerical study of the evolution of periodic perturbations is carried out. Several typical scenarios of their development are presented.

Original languageEnglish
Pages (from-to)223-236
Number of pages14
JournalThermophysics and Aeromechanics
Volume28
Issue number2
DOIs
Publication statusPublished - Mar 2021

Keywords

  • Boussinesq hypothesis
  • evolution equation
  • periodic perturbations
  • thin liquid film
  • turbulent gas flow
  • turbulent viscosity

OECD FOS+WOS

  • 1.07 OTHER NATURAL SCIENCES
  • 1.01 MATHEMATICS
  • 2.03 MECHANICAL ENGINEERING
  • 2.03.DT THERMODYNAMICS
  • 2.03.PU MECHANICS

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