activity
20022025
most citedOrder from chaos: Observation of large-scale flow from turbulence in a two-dimensional superfluid

193 citations · 1.5k across the 50 of their papers we have counts for

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8 papers · 1 filter

physics.flu-dyn2025

Intermittent Motility of a Synthetic Active Particle in Changing Environments

Rudra Sekhri, Rahil N. Valani, Tapio Simula

We experimentally investigate the dynamics of synthetic active particles composed of gravitationally bouncing, superwalking droplets confined within an annular fluid bath. Driven b…

physics.flu-dyn2022

Numerical Simulations of a Superwalking Droplet

Rahil N. Valani, Tapio P. Simula, Anja C. Slim

A new class of walking droplets, coined superwalkers, has been observed when a bath of silicone oil is vibrated simultaneously at a given frequency and its subharmonic tone with a…

physics.flu-dyn2022★ 7 cited

Liquid Time Crystals

Tapio Simula

We have constructed and characterised an instrument to study gravitationally bouncing droplets of fluid, subjected to periodic driving force. Our system incorporates a droplet prin…

physics.flu-dyn2020★ 6 cited

Stop-and-go locomotion of superwalking droplets

Rahil N. Valani, Anja C. Slim, Tapio P. Simula

Vertically vibrating a liquid bath at two frequencies, and , having a relative phase difference can give rise to self-propelled superwalking droplets on the liquid…

physics.flu-dyn2020★ 26 cited

Unsteady dynamics of a classical particle-wave entity

Rahil N. Valani, Anja C. Slim, David M. Paganin +2

A droplet bouncing on the surface of a vertically vibrating liquid bath can walk horizontally, guided by the waves it generates on each impact. This results in a self-propelled cla…

physics.flu-dyn2019★ 15 cited

Emergence of superwalking droplets

Rahil Valani, Jack Dring, Tapio Simula +1

A new class of self-propelled droplets, coined superwalkers, has been shown to emerge when a bath of silicone oil is vibrated simultaneously at a given frequency and its subharmoni…

physics.flu-dyn2018★ 51 cited

Superwalking droplets

Rahil N. Valani, Anja C. Slim, Tapio Simula

A \textit{walker} is a droplet of liquid that self-propels on the free surface of an oscillating bath of the same liquid through feedback between the droplet and its wave field. We…

physics.flu-dyn2018★ 24 cited

Hong-Ou-Mandel-like two-droplet correlations

Rahil N. Valani, Anja C. Slim, Tapio Simula

We present a numerical study of two-droplet pair correlations for in-phase droplets walking on a vibrating bath. Two such walkers are launched towards a common origin. As they appr…