Vortex Locking in Direct Numerical Simulations of Quantum Turbulence

Karla Morris, Joel Koplik, and Damian W. I. Rouson

Phys. Rev. Lett. 101, 015301 – Published 3 July 2008

Abstract

Direct numerical simulations are used to examine the locking of quantized superfluid vortices and normal fluid vorticity in evolving turbulent flows. The superfluid is driven by the normal fluid, which undergoes either a decaying Taylor-Green flow or a linearly forced homogeneous isotropic turbulent flow, although the back reaction of the superfluid on the normal fluid flow is omitted. Using correlation functions and wavelet transforms, we present numerical and visual evidence for vortex locking on length scales above the intervortex spacing.

Received 28 February 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.015301

Authors & Affiliations

Karla Morris¹, Joel Koplik^2,3, and Damian W. I. Rouson⁴

¹Department of Mechanical Engineering, City College of the City University of New York, New York, New York 10031, USA
²Benjamin Levich Institute, City College of the City University of New York, New York, New York 10031, USA
³Department of Physics, City College of the City University of New York, New York, New York 10031, USA
⁴Scalable Computing Research and Development Department, Sandia National Laboratories, Livermore, California 94550, USA

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Vol. 101, Iss. 1 — 4 July 2008

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