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Boundary layer separation and vortex creation in superflow through small orifices

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Abstract

We report on numerical solutions of the Gross-Pitaevskii equation for twodimensional flow of a super fluid condensate through a small orifice. When the super fluid velocity in the center of the orifice exceeds about 60 % of the speed of sound, the flow in the throat of the orifice becomes unstable to a form of boundary layer separation. Low condensate-density regions bulge away from the walls and form the cores of singly quantized vortices. These detach from the boundary and are convected downstream.

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Authors and Affiliations

  1. Department of Physics, University of Illinois at Urbana-Champaign, 1110 W. Green St., 61801, Urbana, IL, USA

    Michael Stone

  2. Institute of Physics, Sachivalaya Marg, 751005, Bhubaneswar, India

    Ajit M. Srivastava

Authors
  1. Michael Stone
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  2. Ajit M. Srivastava
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Stone, M., Srivastava, A.M. Boundary layer separation and vortex creation in superflow through small orifices. J Low Temp Phys 102, 445–459 (1996). https://doi.org/10.1007/BF00755123

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  • DOI: https://doi.org/10.1007/BF00755123

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