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Force measurements on rising bubbles

Published online by Cambridge University Press:  15 November 2006

WOODROW L. SHEW ,
SEBASTIEN PONCET  and
JEAN-FRANÇOIS PINTON
WOODROW L. SHEW
Affiliation:
Laboratoire de Physique, École Normale Supérieure de Lyon, 69007 Lyon, France
SEBASTIEN PONCET
Affiliation:
Laboratoire de Physique, École Normale Supérieure de Lyon, 69007 Lyon, France Present address: Laboratoire de Modélisation et Simulation Numérique en Mécanique et Génie des Procédés, Technople de Chateau-Gombert, 38 rue F. Joliot Curie, 13451 Marseille, France.
JEAN-FRANÇOIS PINTON
Affiliation:
Laboratoire de Physique, École Normale Supérieure de Lyon, 69007 Lyon, France
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Abstract

The dynamics of millimetre-sized air bubbles rising through still water are investigated using ultrasound velocimetry combined with high-speed video. From measurements of speed and three-dimensional trajectories we calculate time-resolved precise drag and lift forces on the bubble, which give rise to planar zigzag and three-dimensional spiralling motion. Temporal correlations of forces and the oscillatory bubble motions, particularly the lift force, emphasize the importance of the wake vortices found in previous studies.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 569 , 25 December 2006 , pp. 51 - 60
Copyright
© 2006 Cambridge University Press

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