Vorticity Locking and Pressure Dynamics in Finite-Temperature Superfluid Turbulence

Jason Laurie, Andrew W. Baggaley

Research output: Contribution to journalArticlepeer-review


We present a numerical study of finite-temperature superfluid turbulence using the vortex filament model for superfluid helium. We examine the phenomenon of vorticity locking between the normal and superfluid components across a wide range of temperatures, using two different structures of external normal fluid drive. Our analysis is restricted to one-way coupling between the two components, and subject to this simplification, we show that vorticity locking increases with temperature leading to the superfluid flow being more influenced by the characteristics of the normal fluid. This results in stronger superfluid polarization and deviations from Gaussian statistics with a more probable occurrence of extreme fluctuations. We also examine how these properties influence the pressure field and attempt to verify a longstanding Pk∝k−7/3 theoretical quantum signature within the spatial pressure spectrum.
Original languageEnglish
Article number054604
Number of pages19
JournalPhysical Review Fluids
Issue number5
Publication statusPublished - 9 May 2023

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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.


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