Physics

Direction-dependent dynamics of colloidal particle pairs and the Stokes-Einstein relation in quasi-two-dimensional fluids

N. H. Barbhuiya, A. G. Yodh, et al.

This exciting research conducted by Noman Hanif Barbhuiya, A. G. Yodh, and Chandan K. Mishra uncovers the intricate hydrodynamic correlations in quasi-two-dimensional colloidal fluids, revealing how particle behavior is influenced by direction-dependent dynamics and near-field interactions, significantly impacting transport and fluid behavior.

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Abstract

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

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