An Examination of the Flow Induced by the Motion of Many Buoyant Bubbles

被引：6

作者：

Bunner B. ^{[1
]}

Tryggvason G. ^{[1
]}

机构：

[1] Department of Mechanical Engineering, University of Michigan, Ann Arbor

来源：

Journal of Visualization | 1999年 / 2卷 / 2期

关键词：

Bubbly flows; Direct numerical simulations;

D O I：

10.1007/BF03181518

中图分类号：

学科分类号：

摘要：

The results of direct numerical simulations of the motion of many three-dimensional buoyant bubbles in periodic domains are examined. The bubble motion is computed by solving the full Navier-Stokes equations by a parallelized finite difference/front tracking method that allows a fully deformable interface between the bubbles and the ambient fluid and the inclusion of surface tension. The governing parameters are selected such that the average rise Reynolds number is about 25. Two cases are examined. In one, the bubbles are nearly spherical; in the other, the bubbles rise with an ellipsoidal shape. The ellipsoidal bubbles show a much larger fluctuation velocity and by visualizing the flow field it is possible to show that the difference is due to larger vorticity generation and stronger interactions of the deformable bubbles. The focus here is on the early stage of the flow, when both the spherical and the deformable bubbles are nearly uniformly distributed.

引用

页码：153 / 158

页数：5

共 16 条

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