51 citations · 289 across the 43 of their papers we have counts for
9 papers · 1 filter
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…
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…
A Hamiltonian formulation for the motion of an active spheroidal particle suspended in laminar straight duct flow
Brendan Harding, Rahil N. Valani, Yvonne M. Stokes
We analyse a generalisation of Zöttl and Stark's model of active spherical particles [Phys. Rev. Lett. 108, 218104 (2012)] and prolate spheroidal particles [Eur. Phys. J. E 36(1),…
Energy self-balance as the physical basis of orbit quantization
Álvaro G. López, Rahil N. Valani
We show that work done by the non conservative forces along a stable limit cycle attractor of a dissipative dynamical system is always equal to zero. Thus, mechanical energy is pre…
Laminar chaos in systems with random and chaotically time-varying delay
David Müller-Bender, Rahil N. Valani
A type of chaos called laminar chaos was found in singularly perturbed dynamical systems with periodically [Phys. Rev. Lett. 120, 084102 (2018)] and quasiperiodically [Phys. Rev. E…
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…
Hydrodynamic memory and Quincke rotation
Jason K. Kabarowski, Aditya S. Khair, Rahil N. Valani
The spontaneous (so-called Quincke) rotation of an uncharged, solid, dielectric, spherical particle under a steady electric field is analyzed, accounting for the inertia of the par…