F113 大きい貯水槽に接続した円管内で振動する流れが作る渦輪の挙動

概要

論文の詳細を見る
The characteristics of vortex rings generated by sinusoidal motion of fluid in a circular pipe connected perpendicularly with the wall of a large vessel have been investigated experimentally. The time-dependent velocity fields with separated vortices and vortex rings near the opening of the pipe are obtained by the visualization method for a wide range of the Womersley number α. The flow patterns are classified into three types of A, B and C judged from the behavior of fluid particles passing through the pipe opening. The vortex rings formed during the outflow term show similar behavior to an single vortex for moderate α (pattern A), and make a row for slightly high α (pattern B). For sufficiently high α, on the other hand, the vortices separated at the pipe edge do not grow up to vortex rings, being inhaled during the inflow term (pattern C).
日本流体力学会の論文
2001-07-31