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Marangoni and buoyant convection in a cylindrical cell under normal gravity
Author(s) -
Szymczyk J. A.
Publication year - 1991
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.5450690607
Subject(s) - marangoni effect , convection , buoyancy , mechanics , streamlines, streaklines, and pathlines , rayleigh–bénard convection , natural convection , combined forced and natural convection , marangoni number , convection cell , surface tension , rayleigh number , physics , classical mechanics , thermodynamics
The present paper deals with the investigation of thermocapillary and natural convection by applying a white light‐sheet technique for the simultaneous determination of the velocity and the temperature field. The oscillatory Marangoni convection has been visualized with differential interferometry. Streamlines, velocity profiles and isotherms are presented and discussed. A complete separation of a surface tension driven convection roll of hot fluid in the boundary layer and a buoyancy driven convection roll of colder fluid in the liquid volume was discovered. For large driving forces (large Marangoni number) inertia becomes effective and the interface becomes the source of localized eruptions.