Quantifying configurational information for a stochastic particle in a flow-field
New Journal of Physics IOP Publishing 22:8 (2020) 083060
Degenerate states, emergent dynamics and fluid mixing by magnetic rotors
Soft Matter Royal Society of Chemistry 16:28 (2020) 6484-6492
Abstract:
We investigate the collective motion of magnetic rotors suspended in a viscous fluid under a uniform rotating magnetic field. The rotors are positioned on a square lattice, and low Reynolds hydrodynamics is assumed. For a 3 × 3 array of magnets, we observe three characteristic dynamical patterns as the external field strength is varied: a synchronized pattern, an oscillating pattern, and a chessboard pattern. The relative stability of these depends on the competition between the energy due to the external magnetic field and the energy of the magnetic dipole-dipole interactions among the rotors. We argue that the chessboard pattern can be understood as an alternation in the stability of two degenerate states, characterized by striped and spin-ice configurations, as the applied magnetic field rotates. For larger arrays, we observe propagation of slip waves that are similar to metachronal waves. The rotor arrays have potential as microfluidic devices that can mix fluids and create vortices of different sizes.Cooperatively enhanced reactivity and “stabilitaxis” of dissociating oligomeric proteins
Proceedings of the National Academy of Sciences of the United States of America Proceedings of the National Academy of Sciences 117:22 (2020) 11894-11900
Bose–Einstein-like condensation due to diffusivity edge under periodic confinement
New Journal of Physics IOP Publishing 22:6 (2020) 063045