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Waves on thin films of pseudoplastic liquids
Author(s) -
Tekic Miodrag N.,
Mitrovic Milan
Publication year - 1978
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450560405
Subject(s) - shear thinning , thinning , wavelength , materials science , mechanics , wave motion , boundary layer , fluid motion , motion (physics) , flow (mathematics) , boundary (topology) , rheology , optics , physics , mathematics , composite material , mathematical analysis , classical mechanics , ecology , biology
Wavy flow of a thin pseudoplastic fluid film down a smooth vertical plate has been analytically studied. A boundary layer equation of motion was solved to obtain expressions which permit the prediction of characteristic parameters values of pseudoplastic liquids in wave motion. The presented analysis gives better agreement between predicted and measured values of wavelength and critical regime for wave inception than the existing theories. Also a good agreement was obtained between predicted and measured values of the mean film thickness.