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19922026
Showing 2022 · physics.flu-dynShow all

12 papers · 2 filters

physics.flu-dyn2022★ 3 cited

How dirt cones form on glaciers: field observation, laboratory experiments and modeling

Marceau Hénot, Vincent J. Langlois, Nicolas Plihon +1

Dirt cones are meter-scale structures encountered at the surface of glaciers, which consist of ice cones covered by a thin layer of ashes, sand or gravel, and which form naturally…

physics.flu-dyn2022★ 5 cited

A playground for compressible natural convection with a nearly uniform density

Thierry Alboussiere, Jezabel Curbelo, Fabien Dubuffet +2

In the quest to understand the basic universal features of compressible convection, one would like to disentangle genuine consequences of compression from spatial variations of tra…

physics.flu-dyn2022★ 2 cited

Superfluid drain vortex

Wandrille Ruffenach, Luca Galantucci, Carlo F. Barenghi

Drain vortices are among the most common vortices observed in everyday life, yet their physics is complex due to the competition of vorticity's transport and diffusion, and the pre…

physics.flu-dyn2022★ 14 cited

Phoresis in cellular flows: from enhanced dispersion to blockage

Romain Volk, Michaël Bourgoin, Charles-Édouard Bréhier +1

In this article, we study numerically the dispersion of colloids in a two-dimensional cellular flow in the presence of an imposed mean salt gradient. Owing to the additional scalar…

physics.flu-dyn2022★ 5 cited

Functional renormalisation group approach to shell models of turbulence

Côme Fontaine, Malo Tarpin, Freddy Bouchet +1

Shell models are simplified models of hydrodynamic turbulence, retaining only some essential features of the original equations, such as the non-linearity, symmetries and quadratic…

physics.flu-dyn2022★ 5 cited

Fast and Furious dynamo action in the anisotropic dynamo

Franck Plunian, Thierry Alboussière

In the limit of large magnetic Reynolds numbers, it is shown that a smooth differential rotation can lead to fast dynamo action, provided that the electrical conductivity or magnet…

physics.flu-dyn2022★ 3 cited

Breaking of internal waves parametrically excited by ageostrophic anticyclonic instability

Yohei Onuki, Sylvain Joubaud, Thierry Dauxois

A gradient-wind balanced flow with an elliptic streamline parametrically excites internal inertia-gravity waves through ageostrophic anticyclonic instability (AAI). This study nume…

physics.flu-dyn2022★ 1 cited

From ray tracing to waves of topological origin in continuous media

Antoine Venaille, Yohei Onuki, Nicolas Perez +1

Inhomogeneous media commonly support a discrete number of wave modes that are trapped along interfaces defined by spatially varying parameters. When they are robust against continu…

physics.flu-dyn2022★ 7 cited

Eddy-Viscous Modeling and the Topology of Extreme Circulation Events in Three-Dimensional Turbulence

G. B. Apolinário, L. Moriconi, R. M. Pereira +1

We discuss the role of particular velocity field configurations -- instantons, for short -- which are supposed to dominate the flow during the occurrence of extreme turbulent circu…

physics.flu-dyn2022★ 7 cited

Triadic resonant instability in confined and unconfined axisymmetric geometries

Samuel Boury, Paco Maurer, Sylvain Joubaud +2

We present an investigation of the resonance conditions of axisymmetric internal wave sub-harmonics in confined and unconfined domains. In both cases, sub-harmonics can be spontane…

physics.flu-dyn2022★ 18 cited

Low-order moments of the velocity gradient in homogeneous compressible turbulence

PingFan Yang, Jian Fang, Le Fang +2

We derive from first principles analytic relations for the second and third order moments of the velocity gradient mij = dui/dxj in compressible turbulence, which generalize known…

physics.flu-dyn2022★ 32 cited

Vorticity-strain rate dynamics and the smallest scales of turbulence

Dhawal Buaria, Alain Pumir

Building upon the intrinsic properties of Navier-Stokes dynamics, namely the prevalence of intense vortical structures and the interrelationship between vorticity and strain rate,…