AM06-03-016 歳差運動する球体内流れ構造(乱流渦構造(4),一般講演)

概要

論文の詳細を見る
Aiming at generating various kinds of flows by a single equipment, we constructed an experimental apparatus which biaxially rotates a sphere around vertical and horizontal axes at constant angular velocities Ω_V and Ω_H, respectively. The motion of fluid in this precessing sphere is visualized, and its velocity field is measured by particle image velocimetry (PIV). The flow is controlled by Reynolds number Re (defined by Ω_H, the radius of the sphere and kinematic viscosity of fluid) and the ratio of two angular velocities W (=Ω_V/Ω_H). It is confirmed by the visualization and PIV that by changing Ω_H and Ω_V (and therefore Re and W) we can produce any kind of flow, such as stationary flow, periodic flow, developed or un-developed turbulence, inside the sphere.
日本流体力学会の論文
2006-09-05