Author(s)

H. Power

Abstract

Invited Paper Boundary elements formulation for the interaction of a deformable bubble with a rigid wall at small Reynolds number H. Power Wessex Institute of Technology, University of Portsmouth, Southampton, England, (on leave /rom [/mrerazcW Cenfro/ de T/enezWo, de /mpemerm, TWzWo de Meca^zca cfe Caracas, Venezeuela Abstract The unsteady viscous flow induced by a deformable gas bubble approaching a rigid boundary is investigated for small Reynolds number. The Stokes equation was solved by means of a Boundary Element method that leads to a unique sur- face velocity regardless the shape of the bubble. The bubble motion is driven by buoyancy force. The good agreement with previous works using different numer- ical techniques confirms the reliability of the numerical technique developed. Introduction: The practical importance of studying the deformation of bubbles moving under the action of gravity in an ambient suspending fluid is due to their common occu

Keywords