Lattice Boltzmann Simulation of Multiple Bubbles Motion under Gravity

Abstract and Applied Analysis

JianzhongLin¹  DemingNie¹  LiminQiu¹  XiaobinZhang¹ 

DOI  :  10.1155/2015/706034

学科分类：数学（综合）

来源: Hindawi Publishing Corporation

【 摘 要 】

The motion of multiple bubbles under gravity in two dimensions is numerically studied through the lattice Boltzmann method for the Eotvos number ranging from 1 to 12. Two kinds of initial arrangement are taken into account: vertical and horizontal arrangement. In both cases the effects of Eotvos number on the bubble coalescence and rising velocity are investigated. For the vertical arrangement, it has been found that the coalescence pattern is similar. The first coalescence always takes place between the two uppermost bubbles. And the last coalescence always takes place between the coalesced bubble and the bottommost bubble. For four bubbles in a horizontal arrangement, the outermost bubbles travel into the wake of the middle bubbles in all cases, which allows the bubbles to coalesce. The coalescence pattern is more complex for the case of eight bubbles, which strongly depends on the Eotvos number.

【 授权许可】

Unknown