Flow structure in three-dimensional waves on a vertically falling liquid film

We have simultaneously measured the velocity vector and film thickness fields in three-dimensional (3D) waves formed upon the decay of regular 2D waves on a liquid film flowing down a vertical plate. Velocity fields at various distances from the plate surface in various regions of a 3D wave are cons...

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Bibliographic Details
Published in:Technical physics letters 2017-09, Vol.43 (9), p.821-824
Main Authors: Kvon, A. Z., Bobylev, A. V., Guzanov, V. V., Kharlamov, S. M., Markovich, D. M.
Format: Article
Language:English
Subjects:
Boundary layer
Classical and Continuum Physics
Falling liquid films
Film thickness
Fluid dynamics
Liquid flow
Physics
Physics and Astronomy
Plates (structural members)
Three dimensional flow
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Summary:We have simultaneously measured the velocity vector and film thickness fields in three-dimensional (3D) waves formed upon the decay of regular 2D waves on a liquid film flowing down a vertical plate. Velocity fields at various distances from the plate surface in various regions of a 3D wave are constructed. It is shown that the liquid flow in the wave has a complex structure with regions of backflow and spanwise streams, which mainly occur under the main crest of the wave.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785017090218