17 papers
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…
Wave-Like Statistics from Classical Active Particles with Internal Degrees Of Freedom
Rahil N. Valani
Wave-like spatial statistics in walking-droplet systems are often associated with wave-mediated interactions and wave-memory effects. Here we explore how similar statistical struct…
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…
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…