A review of shaped colloidal particles in fluids: anisotropy and chirality

TA Witten, H Diamant - Reports on progress in physics, 2020 - iopscience.iop.org
This review treats asymmetric colloidal particles moving through their host fluid under the
action of some form of propulsion. The propulsion can come from an external body force or …

Hamiltonian dynamics and structural states of two-dimensional active particles

Y Shoham, N Oppenheimer - Physical Review Letters, 2023 - APS
We show that a two-dimensional system of flocking active particles interacting
hydrodynamically can be expressed using a Hamiltonian formalism. The Hamiltonian …

Stokes flows in three-dimensional fluids with odd and parity-violating viscosities

T Khain, C Scheibner, M Fruchart… - Journal of Fluid …, 2022 - cambridge.org
The Stokes equation describes the motion of fluids when inertial forces are negligible
compared with viscous forces. In this article, we explore the consequence of parity-violating …

Trading particle shape with fluid symmetry: on the mobility matrix in 3-D chiral fluids

T Khain, M Fruchart, C Scheibner, TA Witten… - Journal of Fluid …, 2024 - cambridge.org
Chiral fluids–such as fluids under rotation or a magnetic field as well as synthetic and
biological active fluids–flow in a different way than ordinary ones. Due to symmetries broken …

Free-space and near-wall dynamics of a flexible sheet sedimenting in Stokes flow

Y Yu, MD Graham - Physical Review Fluids, 2024 - APS
We present a numerical study of a thin elastic sheet with small extensibility freely
sedimenting in a viscous fluid. Two scenarios are investigated: sedimentation in free space …

Hydrodynamic coupling melts acoustically levitated crystalline rafts

B Wu, B VanSaders, MX Lim… - Proceedings of the …, 2023 - National Acad Sciences
Going beyond the manipulation of individual particles, first steps have recently been
undertaken with acoustic levitation in air to investigate the collective dynamical properties of …

Waves, algebraic growth, and clumping in sedimenting disk arrays

R Chajwa, N Menon, S Ramaswamy, R Govindarajan - Physical Review X, 2020 - APS
An array of spheres descending slowly through a viscous fluid always clumps [JM Crowley,
J. Fluid Mech. 45, 151 (1971) JFLSA7 0022-1120 10.1017/S0022112071003045]. We show …

Sedimenting pairs of elastic microfilaments

M Bukowicki, ML Ekiel-Jeżewska - Soft Matter, 2019 - pubs.rsc.org
The dynamics of two identical elastic filaments settling under gravity in a viscous fluid in the
low Reynolds number regime is investigated numerically. A large family of initial …

Hydrodynamically induced aggregation of two dimensional oriented active particles

R Bashan, N Oppenheimer - Soft Matter, 2024 - pubs.rsc.org
We investigate a system of co-oriented active particles interacting only via hydrodynamic
and steric interactions in a two-dimensional fluid. We offer a new method of calculating the …

Dynamics of mass polar spheroids during sedimentation

K Nissanka, X Ma, JC Burton - Journal of Fluid Mechanics, 2023 - cambridge.org
The dynamics of sedimenting particles under gravity are surprisingly complex due to the
presence of effective long-ranged forces. When the particles are polar with a well-defined …