Two-phase flow in the vicinity of an elongated bubble in a fluidized bed

Authors

  • Yeshayahou Levy,

    Corresponding author
    1. Faculty of Aerospace Engineering, Technion–Israel Institute of Technology, Haifa 32000, Israel
    • Faculty of Aerospace Engineering, Technion–Institute of Technology, Haifa 32000, Israel
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  • Yuri Dorfman

    1. Faculty of Aerospace Engineering, Technion–Israel Institute of Technology, Haifa 32000, Israel
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Abstract

Fluid and solid dynamics inside and outside a stable elongated gas bubble in operating conditions corresponding to those of the channeling regime in a fluidized bed are described. It considers the prolate ellipsoid of revolution as a model of the bubble. The results of the analytical model show a significant increase of the fluid velocity inside the bubble with the growth of its relative height. The maximum values of the fluid velocities exist along the vertical axis of the bubble. For the limiting case of a spherical bubble, the fluid and gas performance, such as the existence of a surface of penetration outside the bubble boundaries and circulation zone inside the bubble, are in good agreement with the existing theory.

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