Flow in a partially filled, rotating, tapered cylinder

The secondary flow patterns induced by a differentially rotating lid in a partially filled, rapidly rotating, tapered cylinder have been investigated. Using a new laser-Doppler velocimeter system capable of making measurements in the rotor frame of reference, the radial dependence of the azimuthal a...

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Bibliographic Details
Published in:Journal of fluid mechanics 1989-06, Vol.203, p.541-555
Main Authors: Ribando, R. J., Palmer, J. L., Scott, J. E.
Format: Article
Language:English
Subjects:
cylinders
Exact sciences and technology
flow
Flows in ducts, channels, nozzles, and conduits
Fluid dynamics
Fundamental areas of phenomenology (including applications)
incompressible fluids
lasers
Physics
rotors
velocity measurement
viscous flow
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Summary:The secondary flow patterns induced by a differentially rotating lid in a partially filled, rapidly rotating, tapered cylinder have been investigated. Using a new laser-Doppler velocimeter system capable of making measurements in the rotor frame of reference, the radial dependence of the azimuthal and axial velocity components was measured at two axial positions in the rotor. A linear, asymptotic analysis and a finite-difference simulation were made for comparison. The latter was performed on a boundary-fitted computational mesh so that the slanted rotor wall and the sagging free surface could be accommodated in the model. The agreement between the experimental and numerical results was excellent for the azimuthal velocity component and good for the axial component. Of particular interest is the modified E½ boundary layer on the slanted wall, a feature which is not present with a vertical sidewall.
ISSN:0022-1120
1469-7645
DOI:10.1017/S0022112089001588