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2012.24: Unsteady fronts in the spin-down of a fluid-filled torus

2012.24: C. del Pino, R.E. Hewitt, R.J.C. Clarke, T. Mullin and J.P. Denier (2008) Unsteady fronts in the spin-down of a fluid-filled torus. Physics of Fluids, 20.

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DOI: 10.1063/1.3054146


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 2003 > 47 Fluid dynamics
MIMS number:2012.24
Deposited By:Dr Richard E. Hewitt
Deposited On:29 January 2012

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