Abstract
Flow of viscoelastic fluid contained between a rotating outer sphere and a stationary outer hemisphere is studied experimentally. In the present investigation, relatively low-concentration polyacrylamide-water solutions are used as viscoelastic fluid, and for sake of comparison glycerin-water solutions are used as the Newtonian fluid. In experiments, the measurements results of torque and thrust showed strong dependence on Reynolds number, a gap ration, and thrust characteristics.
