51 citations · 289 across the 43 of their papers we have counts for
8 papers · 1 filter
Competing routes to spontaneous flow in confined active nematics
Rahil N. Valani, Vedad Dzanic, Sumesh P. Thampi +1
Active nematics can spontaneously develop flow beyond a critical activity in confined geometries. We show analytically that the onset of flow is governed by two competing instabili…
An active Lorentz gas: walking droplets in periodic media
Aleksi Majaniemi, Esko Toivonen, Rahil N. Valani +2
The Lorentz gas is a paradigmatic model in dynamical systems theory for understanding the origin of nonequilibrium transport in terms of microscopic deterministic chaos. In the per…
Synchronization induces Bell violations in a model of walking droplets
Álvaro G. López, Rahil N. Valani, Yuanmei Li +1
We consider a reduced Lorenz-like model that describes two walking droplets interacting through their mutual wave field, and investigate the emergence of strong bipartite correlati…
Intermittent Flocking and Fractal Collective Order Induced by Time-Varying Delays
David Müller-Bender, Rahil N. Valani
Time-varying interaction delays are ubiquitous in active matter, yet their collective effects remain largely unexplored. We show that active particles with internal dynamics and Vi…
Longitudinal particle separation
Siluvai Antony Selvan, Rahil N Valani, Brendan Harding +1
Owing to inertial effects, the flow through a three-dimensional curved duct focuses finite-sized spherical particles in the two-dimensional cross-section onto either stable equilib…
Emergent Active Clusters through Wave-Mediated Interactions
Yuanmei Li, Rahil Valani
Collective behaviour in active matter usually emerges from interactions between individually stable units. Here we demonstrate a different route to collective organization using dr…
Shear-Induced Collective Shape Oscillations in Dense Soft Suspensions
Ioannis Hadjifrangiskou, Rahil N. Valani, Diogo E. P. Pinto
Dense suspensions of deformable particles can exhibit rich nonequilibrium dynamics arising from complex flow-structure coupling. Using a multi-phase field model, we show that stead…
Active Soft-Impact Oscillator: Dynamics of a Walking Droplet in a Non-Smooth Potential
Titir Mukherjee, Rahil N Valani, Soumitro Banerjee
Walking droplets are millimetric fluid drops that propel themselves across a vibrated liquid bath through interaction with their self-generated waves. They constitute classical act…