PROPAGATION OF THE VELOCITY SHEAR FRONT IN SPIN-UP FROM REST IN A CUT-CONE

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The behavior of the dominant azimuthal velocity field during spin-up from rest of a homogeneous fluid in a cut-cone is investigated. The fundamental mechanism of spin-lip process is recapitulated. In line with the classical flow model of Wedemeyer, the importance of the meridional circulation, driven by the Ekman layers, is stressed. The experimental apparatus, together, with the image processing technique of the visualized flow data, is described. The reliability and accuracy of this experimental method are validated by performing parallel measurements using an LDV system. The experimental results clearly indicate that the azimuthal velocity shear front propagates faster as the incline angle of the side wall decreases. In the rotating zone of the interior, the azimuthal velocities are larger in magnitude in a cut-cone than in a circular cylinder of comparable size. Plausible physical explanations are offered, and the experimental observations are supportive of these physical arguments.
Publisher
ASME-AMER SOC MECHANICAL ENG
Issue Date
1995-03
Language
English
Article Type
Article
Keywords

CYLINDER

Citation

JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, v.117, no.1, pp.58 - 61

ISSN
0098-2202
URI
http://hdl.handle.net/10203/77363
Appears in Collection
ME-Journal Papers(저널논문)
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