C-132 一様等方性気泡流乱流場における気泡間衝突の影響

概要

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The turbulence modulation depends on the preferential concentration of bubbles/particles. The preferential concentration of bubbles is much stronger than that of the particles. So in bubbly turbulent flow, it is important to consider bubbles affecting on the fluid. In this paper we apply the Euler-Lagrangian two-way coupling method for isotropic homogeneous turbulent flow and discuss about the turbulence modulation caused by preferential concentration. The preferential concentration often leads to instabilities in the numerical solution. We think that the effect of collision of bubbles increases the diffusion of the same. It is assumed that the interaction of bubbles is primarily binary at low void fraction. We apply the DSMC method for the bubble collision and report the effects of the collision.
日本流体力学会の論文
2003-07-28