Current browse context:
cond-mat.soft
Change to browse by:
References & Citations
Condensed Matter > Soft Condensed Matter
Title: Helical Ribbons: Simple Chiral Sedimentation
(Submitted on 26 Mar 2024)
Abstract: We investigate the sedimentation of chiral particles in viscous fluid flow. We identify helical ribbons as simple particles with strong translation-rotation coupling whose symmetry ensures that the centers of mass, buoyancy, resistance, and mobility coincide. Experimental measurements of both relevant mobility tensors show excellent agreement with simulations of ribbons made of interacting spheres. We observe quasi-periodic angular dynamics causing complex spatial trajectories. In tilt-spin phase space, orbits are closed due to time-reversal and reflection symmetry. Changing the helical ribbon length reveals a bifurcation at which the stable sedimentation orientations switch.
Link back to: arXiv, form interface, contact.