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

C. del Pino, R. E. Hewitt, R. J. Clarke, T. Mullin, J. P. Denier

    Research output: Contribution to journalArticlepeer-review


    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. © 2008 American Institute of Physics.
    Original languageEnglish
    Article number124104
    JournalPhysics of Fluids
    Issue number12
    Publication statusPublished - 2008


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