Journal of Low Temperature Physics

, Volume 183, Issue 3, pp 215–221

Backreaction of Tracer Particles on Vortex Tangle in Helium II Counterflow

  • E. Varga
  • C. F. Barenghi
  • Y. A. Sergeev
  • L. Skrbek
Article

DOI: 10.1007/s10909-015-1430-7

Cite this article as:
Varga, E., Barenghi, C.F., Sergeev, Y.A. et al. J Low Temp Phys (2016) 183: 215. doi:10.1007/s10909-015-1430-7

Abstract

We report computer simulations of the interaction of seeding particles with quantized vortices and with the normal fluid flow in thermal counterflow of superfluid \(^4\)He. We show that if the number of particles is too large, the vortex tangle is significantly affected, posing problems in the interpretation of visualization experiments. The main effects are an increase in vortex line density and a change in polarization of the vortex tangle, caused by the action of the Stokes drag of the viscous normal fluid on the trapped particles. We argue that in the case of large particle number, typically used for the particle image velocimetry technique, the tangle properties might become significantly changed. On the contrary, the particle tracking velocimetry technique that uses smaller particle concentration should not be appreciably affected.

Keywords

Superfluid 4He Quantum turbulence Visualization Numerical simulations 

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • E. Varga
    • 1
  • C. F. Barenghi
    • 2
  • Y. A. Sergeev
    • 3
  • L. Skrbek
    • 1
  1. 1.Faculty of Mathematics and PhysicsCharles UniversityPragueCzech Republic
  2. 2.Joint Quantum Centre Durham-Newcastle, School of Mathematics and StatisticsNewcastle UniversityNewcastle upon TyneUK
  3. 3.Joint Quantum Centre Durham-Newcastle, School of Mechanical and Systems EngineeringNewcastle UniversityNewcastle upon TyneUK