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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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.
|Uncontrolled Keywords:||Fluid dynamics, spin-up, rotating flows|
|Subjects:||PACS 2003 > 47 Fluid dynamics|
|Deposited By:||Dr Richard E. Hewitt|
|Deposited On:||29 January 2012|