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On the stability of viscous flow between rotating cylinders Part 1. Asymptotic analysis

Published online by Cambridge University Press:  28 March 2006

R. L. Duty  and
W. H. Reid
R. L. Duty
Affiliation:
Brown University, Providence, Rhode Island Present address: Aerospace Corporation, Los Angeles, California
W. H. Reid
Affiliation:
Brown University, Providence, Rhode Island Present address: Departments of Mathematics and the Geophysical Sciences, The University of Chicago.
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Abstract

The stability of Couette flow is discussed in the case in which the cylindes rotate in opposite directions by an asymptotic method in which the Taylor number is treated as a large parameter. On assuming the principle of exchange of stabilities to hold, the problem is then governed by a sixth-order differential equation with a simple turning point. It is shown how the solutions of this equation can be represented asymptotically in terms of the solutions of the comparison equation yvi = xy. The solutions of this comparison equation have recently been tabulated and we thus have an explicit representation of the solution of the stability problem in terms of tabulate functions. Detailed results for the critical Taylor number and wave-number at the onset of instability and the associated eigenfunctions are given for the limiting case μ → − ∞, where μ = Ω2/Ω1, and Ω1 and Ω2 are the angular velocities of the inner and outer cylinders respectively. In this limiting case it is found that there exists and infinite number of cells between the cylinders, but that the amplitude of the secondary motion in all but the innermost cell is small.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 20 , Issue 1 , September 1964 , pp. 81 - 94
Copyright
© 1964 Cambridge University Press

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