This paper experimentally investigates hydrodynamic correlations between particles in quasi-two-dimensional colloidal fluids. The study reveals direction-dependent dynamics of particle pairs, quantitatively linked to near-field hydrodynamic interactions. This direction dependence is shown to influence the Stokes-Einstein relation (SER), leading to its breakdown under certain conditions. The breakdown is ameliorated along directions with minimal hydrodynamic correlations. The research highlights the significant impact of near-field hydrodynamics on transport and fluid restructuring in two dimensions.
Publisher
Nature Communications
Published On
Aug 22, 2023
Authors
Noman Hanif Barbhuiya, A. G. Yodh, Chandan K. Mishra
Tags
hydrodynamics
colloidal fluids
particle dynamics
Stokes-Einstein relation
two-dimensional fluids
near-field interactions
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