Bouncing droplets on a billiard table

Abstract

In a set of experiments, Couder et. al. demonstrate that an oscillating fluid bed may propagate a bouncing droplet through the guidance of the surface waves. We present a dynamical systems model, in the form of an iterative map, for a droplet on an oscillating bath. We examine the droplet bifurcation from bouncing to walking, and prescribe general requirements for the surface wave to support stable walking states. We show that in addition to walking, there is a region of large forcing that may support the chaotic bouncing of the droplet. Using the map, we then investigate the droplet trajectories for two different wave responses in a square (billiard ball) domain. We show that for waves which are quickly damped in space, the long time trajectories in a square domain are either non-periodic dense curves, or approach a quasiperiodic orbit. In contrast, for waves which extend over many wavelengths, at low forcing, trajectories tend to approach an array of circular attracting sets. As the forcing increases, the attracting sets break down and the droplet travels throughout space.

References in corpus (1)

• Path-memory induced quantization of classical orbits

Cited by in corpus (7)

• Non-Hamiltonian features of a classical pilot-wave dynamics
• Neimark--Sacker bifurcation and evidence of chaos in a discrete dynamical model of walkers
• Scattering theory of walking droplets in the presence of obstacles
• Non-specular reflections in a macroscopic system with wave-particle duality: spiral waves in bounded media
• Walking Droplets Through the Lens of Dynamical Systems
• Standard map-like models for single and multiple walkers in an annular cavity
• Asymptotic dynamics of reflecting spiral waves