The VORTECS (superfluid VORtex TurbulencE on a Curved Surface) project is a joint theory-experiment effort to investigate superfluid dynamics on the surface of a bubble. It aims first at evidencing long-wavelength Rossby waves and zonal (azimuthal) flows driven by a latitude-dependent Coriolis force, a superfluid analogue of atmospheric hydrodynamics. The relevant parameters can be varied over a wide range on the experimental platform: the rotation speed from subsonic to hypersonic and the latitude from the south pole to the equator. Second, in order to access individual vortex trajectories, we will implement a non destructive, in situ, high resolution imaging scheme. We will also develop an effective kinetic model describing a dilute vortex gas to gain quantitative understanding of the energy and momentum redistribution processes. This will give access to the dynamics of large vortex clusters, a crucial feature of two-dimensional turbulence. The kinetic model will help guiding the experiment to reach and characterize turbulent states. Finally the interplay of curvature, rotation, large-scale instabilities and vortex dynamics will be evidenced in the competition between vortex clustering and formation of large scale azimuthal flows.
Monsieur Romain Dubessy (Laboratoire de physique des lasers)
The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.
INPHYNI Université Côte d'Azur
LPL Laboratoire de physique des lasers
Help of the ANR 407,183 euros
Beginning and duration of the scientific project: December 2022 - 48 Months