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…
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…
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…
From Equilibrium Multistability to Spatiotemporal Chaos in Channel Flows of Nematic Fluids
Rahil N. Valani, Sumesh Thampi, Julia M. Yeomans
We investigate channel-confined, nematic liquid crystals using the Beris-Edwards model of nematohydrodynamics. Using strong homeotropic anchoring at the walls, we find multistabili…
Active wave-particle clusters
Rahil N. Valani, David M. Paganin
Active particles are non-equilibrium entities that uptake energy and convert it into self-propulsion. A dynamically rich class of inertial active particles having features of wave-…
Nematic order from phase synchronization of shape oscillations
Ioannis Hadjifrangiskou, Sumesh P. Thampi, Rahil N. Valani
We show that a suspension of non-interacting deformable particles subjected to an oscillatory shear flow leads to development of nematic order that arises from the phenomenon of ph…
Asymmetric limit cycles within Lorenz chaos induce anomalous mobility for a memory-driven active particle
Rahil N. Valani, Bruno S. Dandogbessi
On applying a small bias force, non-equilibrium systems may respond in paradoxical ways such as with giant negative mobility (GNM) -- a large net drift opposite to the applied bias…