Unsteady fronts in the spin-down of a fluid-filled torus

del Pino, C. and Hewitt, R.E. and Clarke, R.J.C. and Mullin, T. and Denier, J.P. (2008) Unsteady fronts in the spin-down of a fluid-filled torus. Physics of Fluids, 20.

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Abstract

We report the results of an experimental investigation into fluid motion induced by the deceleration to rest of a rigidly rotating fluid-filled torus. Transition to a transient turbulent state is found where the onset of the complicated motion is triggered by a small scale wavelike instability. The wave forms on a front that propagates from the inner wall of the toroidal container after it is stopped. We reveal the origins of the front through a combination of careful experimental measurements, boundary-layer analysis and computation of the axisymmetric Navier--Stokes equations.

Item Type:	Article
Uncontrolled Keywords:	Fluid dynamics, spin-up, rotating flows
Subjects:	PACS 2010, the AIP's Physics and Astronomy Classification Scheme > 40 ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID MECHANICS > 47 Fluid dynamics
Depositing User:	Dr Richard E. Hewitt
Date Deposited:	29 Jan 2012
Last Modified:	20 Oct 2017 14:13
URI:	https://eprints.maths.manchester.ac.uk/id/eprint/1768

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