Abstract
Many researchers have studied the flow around single/plural rotating disks with infinite/finite radii. These flow problems can be found out in various industrial applications such as axial compressors, vaneless diffusers, multiple-disk pumps, disk/dram-brake systems. In general, these types of flow are likely to entail non-axisymmetric secondary flows, which occasionally cause disk vibrations and noises. In the present study, the author especially deal with the flow between co-rotating disks, namely, the disks which rotate co-axially in the same direction at the same angular velocity, with a narrow gap enclosed by a stationary shroud at their circumferences. This flow is modeled on that inside the random-access disk storage devices of computers. The author experimentally and numerically shows that this flow is very complicated with three-dimensionality and turbulence, despite the simplicity in its imposed boundary conditions of geometry.
