Dynamics of bubbles crossing a liquid-liquid interface

作者：Bonhomme Romain^*; Magnaudet Jacques; Piar Bruno

来源：Mecanique & Industries, 2011, 12(3): 163-167.

DOI：10.1051/meca/2011108

• Bubbles
• triphasic flow
• liquid-liquid interface
• direct numerical simulation

Dynamics of bubbles crossing a liquid-liquid interface. We investigate experimentally and computationally the passage of air bubbles through an initially flat horizontal interface separating two Newtonian liquids. We use various liquids in such a way that their viscosity ratio can vary by more than two orders of magnitude; the density contrast and the interfacial tension also vary to a certain extent. Two different injection systems are used and allow us to generate bubbles with diameters ranging typically from 1 mm to 2 cm, the biggest bubbles being toroidal. In parallel we carry out axisymmetric computations based on two distinct approaches, namely an interface capturing technique (a VOF approach without interface reconstruction) and a Cahn-Hilliard model coupled with the Navier-Stokes equations.

• 出版日期2011