Interactions between particles and quantized vortices in superfluid helium

Demosthenes Kivotides, Carlo F. Barenghi, Yuri A. Sergeev

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

We present a numerical, computational, and physical analysis of particle-vortex collisions in thermal superfluids. Our method allows fully self-consistent, dynamic computation of particle-vortex collisions within the vortex dynamical formalism. The algorithm is described in detail and is shown to be both accurate and efficient. The method is applied to the collision of a solid particle with a straight vortex at finite temperature. It predicts that the smallest velocity that the approaching particle must have in order to escape the vortex after being captured by it increases as the temperature approaches the superfluid transition temperature. A comparative study of particle-vortex collisions at various temperatures reveals the contributions of viscous damping, inertial, and boundary-induced effects on the dynamics of the system, as well as different particle-vortex interaction behaviors. The findings corroborate the possibility of direct measurement of the normal fluid velocity in thermal superfluids via appropriately designed particle image velocimetry experiments.
LanguageEnglish
Article number014527
Number of pages13
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume77
Issue number1
DOIs
Publication statusPublished - 28 Jan 2008

Fingerprint

Superfluid helium
Particle interactions
Vortex flow
helium
vortices
interactions
collisions
viscous damping
particle image velocimetry
Velocity measurement
Temperature
Superconducting transition temperature
escape
numerical analysis
temperature
Damping
transition temperature
formalism
Fluids
fluids

Keywords

  • vortices
  • superfluid helium
  • particle-vortex collisions

Cite this

@article{45a28014532a4db9a7059eb28af2fec2,
title = "Interactions between particles and quantized vortices in superfluid helium",
abstract = "We present a numerical, computational, and physical analysis of particle-vortex collisions in thermal superfluids. Our method allows fully self-consistent, dynamic computation of particle-vortex collisions within the vortex dynamical formalism. The algorithm is described in detail and is shown to be both accurate and efficient. The method is applied to the collision of a solid particle with a straight vortex at finite temperature. It predicts that the smallest velocity that the approaching particle must have in order to escape the vortex after being captured by it increases as the temperature approaches the superfluid transition temperature. A comparative study of particle-vortex collisions at various temperatures reveals the contributions of viscous damping, inertial, and boundary-induced effects on the dynamics of the system, as well as different particle-vortex interaction behaviors. The findings corroborate the possibility of direct measurement of the normal fluid velocity in thermal superfluids via appropriately designed particle image velocimetry experiments.",
keywords = "vortices, superfluid helium, particle-vortex collisions",
author = "Demosthenes Kivotides and Barenghi, {Carlo F.} and Sergeev, {Yuri A.}",
year = "2008",
month = "1",
day = "28",
doi = "10.1103/PhysRevB.77.014527",
language = "English",
volume = "77",
journal = "Physical Review B: Condensed Matter and Materials Physics",
issn = "1098-0121",
number = "1",

}

Interactions between particles and quantized vortices in superfluid helium. / Kivotides, Demosthenes; Barenghi, Carlo F.; Sergeev, Yuri A.

In: Physical Review B: Condensed Matter and Materials Physics, Vol. 77, No. 1, 014527, 28.01.2008.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Interactions between particles and quantized vortices in superfluid helium

AU - Kivotides, Demosthenes

AU - Barenghi, Carlo F.

AU - Sergeev, Yuri A.

PY - 2008/1/28

Y1 - 2008/1/28

N2 - We present a numerical, computational, and physical analysis of particle-vortex collisions in thermal superfluids. Our method allows fully self-consistent, dynamic computation of particle-vortex collisions within the vortex dynamical formalism. The algorithm is described in detail and is shown to be both accurate and efficient. The method is applied to the collision of a solid particle with a straight vortex at finite temperature. It predicts that the smallest velocity that the approaching particle must have in order to escape the vortex after being captured by it increases as the temperature approaches the superfluid transition temperature. A comparative study of particle-vortex collisions at various temperatures reveals the contributions of viscous damping, inertial, and boundary-induced effects on the dynamics of the system, as well as different particle-vortex interaction behaviors. The findings corroborate the possibility of direct measurement of the normal fluid velocity in thermal superfluids via appropriately designed particle image velocimetry experiments.

AB - We present a numerical, computational, and physical analysis of particle-vortex collisions in thermal superfluids. Our method allows fully self-consistent, dynamic computation of particle-vortex collisions within the vortex dynamical formalism. The algorithm is described in detail and is shown to be both accurate and efficient. The method is applied to the collision of a solid particle with a straight vortex at finite temperature. It predicts that the smallest velocity that the approaching particle must have in order to escape the vortex after being captured by it increases as the temperature approaches the superfluid transition temperature. A comparative study of particle-vortex collisions at various temperatures reveals the contributions of viscous damping, inertial, and boundary-induced effects on the dynamics of the system, as well as different particle-vortex interaction behaviors. The findings corroborate the possibility of direct measurement of the normal fluid velocity in thermal superfluids via appropriately designed particle image velocimetry experiments.

KW - vortices

KW - superfluid helium

KW - particle-vortex collisions

UR - http://www.scopus.com/inward/record.url?scp=38849124789&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.77.014527

DO - 10.1103/PhysRevB.77.014527

M3 - Article

VL - 77

JO - Physical Review B: Condensed Matter and Materials Physics

T2 - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

SN - 1098-0121

IS - 1

M1 - 014527

ER -