Visualization of Fluid Flow Near a Rotating Disk in Dilute Polymer Solutions

Abstract

To study the characteristics of the fluid flow near a rotating disk in dilute polymer solutions, the oil film and the tracer techniques were employed. The flow angle of the boundary-layer on the rotating disk was measured using the oil film technique, and the correlation between the flow angle and the coefficient of the frictional moment was discussed. The velocity distribution of the laminar boundary-layer of an enclosed disk was measured using the tracer technique, and the boundary-layer characteristics of the dilute polymer solutions were made clear.