Author(s)

P. Tsifourdaris, G.H. Vatistas & W. Ghaly

Abstract

An experimental study on the flow within two disks P. Tsifourdaris, G.H. Vatistas & W. Ghaly Mechanical and Industrial Engineering Department, Concordia University, Canada Abstract The present experimental study concerns the flows generated within the gap of two parallel disks. For the sink-flow the reduction of the cross-sectional area along the flow direction drives the average velocity to increase which is accompanied by a static pressure drop. Due to the non-slip requirement on the upper and lower disks, a boundary layer forms. Increase of the local inertia to viscous forces ratio forces the radial velocity profile to flatten mid-channel. As the radius becomes smaller, the plateau progressively expands towards the wall. The source-flow in comparison to sink-flow, exhibits a reverse behavior of the pressure along the flow direction. However, there is a special phenomenon associated with this type of flow field, which is absent in the previous case. Fluid particles near the walls, moving wit

Keywords