Breakup of a bubble into a convergent-divergent pipe flow

ORAL

Abstract

We present the results of experiments study on the dynamics a bubble into a convergent-divergent pipe flow. The amplitude of the constriction and the magnitude of the flow may result in the breakup of the bubble. The occurrence of a liquid high speed jet in the direction of the flow as an initial step of the bubble breakup is reported for a large range of bubble initial sizes and flow rates. The results are compared to an impulsion model. Further, the behaviour of the bubble cloud in the slightly divergent pipe is described and the distribution in sizes of the ``daughter'' bubbles is analysed.

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Authors

  • Jorge Peixinho

    Fluid Engineering Laboratory, Department of Mechanical Engineering, The University of Tokyo

  • Kazuhiro Hashiguchi

    Fluid Engineering Laboratory, Department of Mechanical Engineering, The University of Tokyo

  • Shu Takagi

    Fluid Engineering Laboratory, Department of Mechanical Engineering, The University of Tokyo, Dept. Mech. Eng., Univ. Tokyo, The University of Tokyo

  • Yoichiro Matsumoto

    Fluid Engineering Laboratory, Department of Mechanical Engineering, The University of Tokyo