流路におかれた角柱列を過ぎる定常流の中での微粒子の横移動

概要

論文の詳細を見る
The motion of small particles is numerically investigated in a steady viscous flow past an infinite array of square cylinders set up along the centerline of a two-dimensional channel. The force acting on the particle is given according to the Stokes drag law. The majority of particles distributed uniformly in a cross section of the channel are forced to move in the lateral direction from the centerline to the wall of the channel and are finally gathered to just near the wall. This phenomenon, the lateral migration, is caused by the centrifugal force on a curved streamline. The lateral migration is intensified as the interval of successive cylinders increases, and the Reynolds number increases nearly proportionally to the interval. This result suggests the possibility that many small particles floating randomly in a fluid flow are gathered on to a plane.
一般社団法人日本機械学会の論文
1994-09-25