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ISSN Druckformat: 2169-2785
ISSN Online: 2167-857X
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INVESTIGATION OF THE VELOCITY FIELD IN THE WAVE RIVULET FLOWING DOWN A VERTICAL PLATE
ABSTRAKT
Complementary measurements of the thickness and velocity fields in wavy rivulets flowing down a vertical plate are conducted using particle image velocimetry and laser-induced fluorescence field techniques. Stagnant areas, in which the liquid flows with the velocity of the waves, are detected under the crests of large-amplitude, low-frequency waves. Longitudinal velocity component profiles are obtained within different parts of the waves. The most noticeable deviations of the velocity profiles from self-parabolic profiles are observed in the region of the capillary precursor and in stagnant areas under the wave crests.
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Al Mukahal F. H. H., Duffy B. R., Wilson S. K., A rivulet of a power-law fluid with constant contact angle draining down a slowly varying substrate, Physics of Fluids, 27, 5, 2015. Crossref