直交格子法を用いた細管内気液二相流の数値解析

抄録

We have conducted numerical simulation of a bubble rising in a capillary tube by using a novel Cartesian grid method. The present method is distinguished from the others by the use of the sharp interface model for the treatment of both liquid-gas interfaces and solid surfaces. The bubble rise velocity obtained by the present simulation has been compared with the existing experimental data at a wide range of Eotovos numbers, and has been shown to be in fairly good agreement. It has been suggested from the comparison study that the grid resolution inside a liquid film, created in between the bubble and the tube wall, is important to predict the rise velocity accurately.