Velocity profile of a boundary jet in a rotating fluid
Abstract
A laminar boundary jet adjacent to a vertical sidewall of a rotating circular cylinder was studied experimentally. The boundary jet was produced by differential rotation of a ring-shaped plate along the periphery of the top surface of the working fluid. The velocity field of the resulting boundary jet was observed by a pH-indicator method with special interest in the case when the width of the driving ring was O (E exp 1/4) (E is the Ekman number). It was demonstrated that the azimuthal velocity has an appreciable vertical shear and that the vertical velocity in the boundary jet is of order E exp 1/4. The vertically averaged azimuthal velocity profile was compared with an empirical formula which is a modified version of the theoretical solution given by Kimura (1976).
- Publication:
-
Kyushu University Research Institute Applied Mechanics Reports
- Pub Date:
- February 1992
- Bibcode:
- 1992KyUAM..38...85Y
- Keywords:
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- Flow Velocity;
- Jet Flow;
- Laminar Flow;
- Rotating Fluids;
- Velocity Distribution;
- Boundary Layer Flow;
- Ekman Layer;
- Flow Distribution;
- Shear Stress;
- Wall Flow;
- Fluid Mechanics and Heat Transfer