Enhancing rotational diffusion using oscillatory shear
Abstract
Taylor dispersion - shear-induced enhancement of translational diffusion - is an important phenomenon with applications ranging from pharmacology to geology. Through experiments and simulations, we show that rotational diffusion is also enhanced for anisotropic particles in oscillatory shear. This enhancement arises from variations in the particle's rotation (Jeffery orbit) and depends on the strain amplitude, rate, and particle aspect ratio in a manner that is distinct from the translational diffusion. This separate tunability of translational and rotational diffusion opens the door to new techniques for controlling positions and orientations of suspended anisotropic colloids. © 2013 American Physical Society.
Date Published
Journal
Physical Review Letters
Volume
110
Issue
22
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878378002&doi=10.1103%2fPhysRevLett.110.228301&partnerID=40&md5=580e6f83876a992d1506289b05db2e55
DOI
10.1103/PhysRevLett.110.228301
Research Area
Group (Lab)
Itai Cohen Group