Wave-number selection by soft boundaries near threshold

Abstract

An explanation is proposed for the increase in the width of the band of allowed states near threshold found in recent experiments by Cannell, Dominguez-Lerma, and Ahlers on wave-number selection in a Taylor-Couette system. A simple parametrization of the forcing of the motion by the nonuniform gap between the cylinders used to yield the selection produces many features of the data.

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