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International Symposium on Multiphase Flow and Transport Phenomena
November, 5-10, 2000, Antalya, Turkey

DOI: 10.1615/ICHMT.1997.IntSymLiqTwoPhaseFlowTranspPhen


ISBN Print: 1-56700-162-9

BUBBLE PLUMES AND THE COANDA EFFECT

page 8
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ABSTRACT

This paper experimentally describes the behaviour of a gas-liquid bubble plume set to develop adjacent to another plume. When this happens, the plume exhibits a type of a Coanda effect, bending towards the other plume. The local gas fraction measurements are carried out using the electro-resistivity probe technique in an air-water system. The deflection angle of the plumes is shown to present a logarithmic dependence on the modified Weber and Froude numbers of the flow. In addition, a simple theory based on integral methods is advanced for the prediction of the plume deflection; the theory considers a variable entrainment coefficient.

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