Internship and thesis proposals
Pilot-wave dynamics of swimming particles in stratified fluids

Domaines
Condensed matter
Statistical physics
Soft matter
Physics of liquids
Nonequilibrium statistical physics
Non-equilibrium Statistical Physics
Hydrodynamics/Turbulence/Fluid mechanics

Type of internship
Expérimental et théorique
Description
Over the past two decades, experiments with bouncing droplets have shown that macroscopic “pilot-wave” systems - where a particle is guided by its self-generated wave - can mimic certain aspects of quantum-like dynamics. We recently demonstrated that similar dynamics emerge when a particle oscillates in a density-stratified fluid, such as in the ocean. The oscillating particle emits internal gravity waves and begins to swim horizontally due to a Doppler effect that creates a non linear propulsive force. These waves propagate over large distances, reflect on boundaries, and can strongly modify—or even cancel—the particle’s motion. A key open question now concerns collective states: how groups of such particles interact through their wave fields. This internship will focus on the simplest case—a pair of particles in the same horizontal plane—using experiments, theory, and simulations.

Contact
Simon Gsell
Laboratory : IRPHE - UMR7342
Team : milieu vivant systemes biologiques
Team Website
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