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The first instability in spherical Taylor-Couette flow

Published online by Cambridge University Press:  21 April 2006

Géza Schrauf
Affiliation:
Applied Mathematics, California Institute of Technology, Pasadena, CA 91125, USA Present address: MBB Transport- und Verkehrsflugzeuge, Abt. TE 213, Huenefeldstr. 1-5, 2800 Bremen 1, West Germany.

Abstract

In this paper continuation methods are applied to the axisymmetric Navier-Stokes equations in order to investigate how the stability of spherical Couette flow depends on the gap size σ. We find that the flow loses its stability due to symmetry-breaking bifurcations and exhibits a transition with hysteresis into a flow with one pair of Taylor vortices if the gap size is sufficiently small, i.e. if σ [les ] σB.

In wider gaps, i.e. for σB < σ [les ] σF, both flows, the spherical Couette flow and the flow with one pair of Taylor vortices, are stable. We predict that the latter exists in much wider gaps than previous experiments and calculations showed. Taylor vortices do not exist if σ > σF. The numbers σB and σF are computed by calculating the instability region of the spherical Couette flow and the region of existence of the flow with one pair of Taylor vortices.

Type
Research Article
Copyright
© 1986 Cambridge University Press

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References

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