C331 管内静止粘性流体中の3粒子の運動(C-33 混相流・機能性流体(3),一般講演)

概要

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The motion of three rigid spheres settling in a viscous fluid symmetrically about the axis of a vertically oriented circular cylinder both theoretically and experimentally. In our experiment the particle Reynolds number is in the range of 0.025-0.171. The cylinder Reynolds number based on the cylinder radius is finite. The ratio of the particle radius to the cylinder radius is in the range of 0.0086-0.0174. The lateral velocities of the spheres were obtained theoretically taking into account of the first-order inertial effects of boundaries. Method of matched asymptotic expansions was used. It was found that three particles settling symmetrically about the axis of a cylinder forced towards an equilibrium position at a distance from the axis of about 0.5 times the cylinder radius.
日本流体力学会の論文
2004-08-09