Spin-up of a two-layer fluid in a rotating cylinder
作者:
J. O'donnell,
P.F. Linden,
期刊:
Geophysical & Astrophysical Fluid Dynamics
(Taylor Available online 1992)
卷期:
Volume 66,
issue 1-4
页码: 47-66
ISSN:0309-1929
年代: 1992
DOI:10.1080/03091929208229049
出版商: Taylor & Francis Group
关键词: Rotating cylinder;two-layer fluid;baroclinic instability;spin-up
数据来源: Taylor
摘要:
we report the results of experiments on the spin-up of two layers of immiscible fluid with a free upper surface in a rotating cylinder over a wide range of internal Froude numbers. Observations of the evolution of the velocity field by particle tracking indicates that spin-up of the azimuthal velocity in the upper layer take much longer than in a homogeneous fluid. Initially, spin-up occurs at a rate comparable to that of homogeneous fluid but, at high internal Froude number, a second phase follows in which the remaining lative motion decays much more slowly. Quantitative comparison of these measurements to the theory of Pedlosky (1967) shows good agreement.
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