抄録
The purpose of the present study is to develop a new system which classifies submicron particles accurately by applying an almost rigidly rotating through-flow between a rigidly rotating housing and a rotor. We performed a linear analysis of the interior region and the Ekman layer developing between the upper and lower walls with arbitrary axisymmetric configurations, and considered the relationship between the flow structure and the wall configuration. The conclusions are as follows. (1) In the interior region, the azimuthal velocity component increases with the gradients of both walls in the radial direction, and the axial velocity component increases with an increase of the difference between the curvatures of both walls. (2) When the coordinate normal to the wall is used in the Ekman layer, the effect of wall configuration appears implicitly in both the azimuthal velocity component and the velocity component tangent to the wall, but appears explicitly in the velocity component normal to the wall.
