Journal of Low Temperature Physics

, Volume 146, Issue 3–4, pp 417–434 | Cite as

Influence of Normal Fluid Disturbances on Interactions of Solid Particles with Quantized Vortices

  • Y. A. Sergeev
  • S. Wang
  • E. Meneguz
  • C. F. Barenghi

Two-dimensional Lagrangian trajectories of the inertial particle in helium II are analyzed in the vicinity of the triple-vortex structure, i.e. the superfluid vortex and the normal dipole-like vortex structure induced by the mutual friction. It is shown that the vortices in the normal fluid can deflect the particle which otherwise would have collided with the superfluid vortex and, provided that the relative velocity of the particle and the vortex is not too large, would have been trapped by it. A geometrical impact parameter, which in the considered two-dimensional model, plays a rôle of the cross-section of particle–vortex collision, is determined and calculated as a function of temperature, externally applied superfluid velocity, and the Stokes number defined by the size of the local vortex structure, superfluid line velocity, and particle viscous response time.

PACS Numbers

67.40.Vs Quantum fluids: vortices and turbulence 47.80.+v Fluid mechanics: instrumentation for fluid mechanics 47.27.-i Fluid mechanics: turbulent flows 


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Y. A. Sergeev
    • 1
  • S. Wang
    • 1
  • E. Meneguz
    • 2
    • 3
  • C. F. Barenghi
    • 4
  1. 1.School of Mechanical and Systems EngineeringNewcastle UniversityNewcastle upon TyneUK
  2. 2.Facoltà di IngegneriaUniversità degli Studi di UdineUdineItaly
  3. 3.Dipartimento di Energetica e MacchineUniversità degli Studi di UdineUdineItaly
  4. 4.School of MathematicsNewcastle UniversityNewcastle upon TyneUK

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