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Journal of Flow Visualization and Image Processing
SJR: 0.11 SNIP: 0.312 CiteScore™: 0.1

ISSN Imprimir: 1065-3090
ISSN On-line: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v5.i1.20
pages 9-15

VORTEX FORMATION NEAR THE GAS/LIQUID/SOLID BOUNDARY OF AN OSCILLATING LIQUID COLUMN

Z. D. Chen
Department of Chemical and Materials Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand
J. J. J. Chen
Department of Chemical and Materials Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand
X. D. Chen
Department of Chemical and Materials Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand

RESUMO

Vortex formation is observed near the liquid free surface close to the solid wall during the vertical oscillation of a liquid column. A visualization study using dye tracer shows that vortex forms and grows during the downward movement of the interface, and at the same time the newly formed vortex pushes away those previously formed. While the interface moves upward, the shape of the vortex is deformed by the counter movement of the solid surface and the gas/liquid interface. Experiments also indicated that the formation, growth, deformation, and penetration of vortices can significantly increase the local mixing and thus enhance the heat and mass transport processes near the gas/liquid/solid boundary.


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