Author(s)

Y. Y. Yan & Y. Q. Zu

Abstract

Bubbles flow in a microchannel is an interfacial and surface tension dominated problem. The paper reports results of numerical modelling and simulation of interfacial behaviour of bubbles flow and coalescence in a square microchannel. The lattice Boltzmann method (LBM) is developed and applied to the simulation in which a simple linear function is applied to the order parameter to approximate the density within the interface of gas-liquid. The evolution of two isothermal air bubbles flowing through a water-filled microchannel at low Reynolds number and the interactions between the flow fields and the interface of gas-liquid are simulated and investigated numerically. Keywords: bubbles, coalescence, microchannel, LBM, interfacial behaviour.

Keywords

bubbles, coalescence, microchannel, LBM, interfacial behaviour