Cavitation in a lubrication flow between a moving sphere and a boundary

J. Ashmore, C. Del Pino, T. Mullin

    Research output: Contribution to journalArticlepeer-review


    A heavy sphere is free to move inside a rotating horizontal cylinder filled with viscous liquid. The steady motion is essentially Stokesian, and the sphere rotates at a fixed location with a lubrication layer between the ball and the wall. The symmetry of the flow field suggests there will be no force to balance the normal component of the ball's weight. However, we show that a normal force can arise when a cavitation bubble is present. The bubble size was measured as a function of the cylinder rotation rate and agrees well with a model which uses the force and torque balances on the sphere. © 2005 The American Physical Society.
    Original languageEnglish
    Article number124501
    JournalPhysical Review Letters
    Issue number12
    Publication statusPublished - 1 Apr 2005


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