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Physics of Fluids
Article . 2025 . Peer-reviewed
Data sources: Crossref
https://dx.doi.org/10.48550/ar...
Article . 2025
License: CC BY
Data sources: Datacite
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Dynamics of vortex clusters on a torus

Authors: null Aswathy K. R.; Udaya Maurya; Surya Teja Gavva; Rickmoy Samanta;

Dynamics of vortex clusters on a torus

Abstract

We investigate the collective dynamics of multivortex assemblies in a two dimensional toroidal fluid film of distinct curvature and topology. The incompressible, inviscid nature of the fluid permits a Hamiltonian description of the vortices, along with a self-force of geometric origin. The Hamiltonian dynamics is constructed in terms of q-digamma functions Ψq(z), closely related to the Schottky–Klein prime function known to arise in multiply connected domains. We show the fundamental motion of the two-vortex system and identify five classes of geodesics on the torus for the special case of a vortex dipole, along with subtle distinctions from vortices in quantum superfluids. In multivortex assemblies, we observe that a randomly initialized chiral cluster of vortices remains geometrically confined on the torus, while undergoing an overall drift along the toroidal direction. A cluster of fast and slow vortices also shows the collective toroidal drift, with the fast ones predominantly occupying the core region of the revolving cluster. Achiral clusters show unconfined dynamics and scatter all over the surface of the torus. A chiral cluster with an impurity in the form of a single vortex of opposite sign also shows similar behavior as a pure chiral cluster, with occasional “jets” of dipoles leaving and reentering the revolving cluster. The work serves as a step toward analysis of vortex clusters in models that incorporate harmonic velocities in the Hodge decomposition.

Keywords

High Energy Physics - Theory, Soft Condensed Matter, High Energy Physics - Theory (hep-th), Quantum Gases (cond-mat.quant-gas), Quantum Gases, Fluid Dynamics (physics.flu-dyn), Soft Condensed Matter (cond-mat.soft), FOS: Physical sciences, Fluid Dynamics, Mathematical Physics (math-ph), Mathematical Physics

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
Green