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Nanoparticle dispersion in porous media: Effects of hydrodynamic interactions and dimensionality
Author(s) -
Mangal Deepak,
Conrad Jacinta C.,
Palmer Jeremy C.
Publication year - 2021
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.17147
Subject(s) - dispersion (optics) , particle (ecology) , porous medium , diffusion , thermal diffusivity , mechanics , materials science , steric effects , curse of dimensionality , power law , flow (mathematics) , nanoparticle , porosity , physics , chemistry , nanotechnology , thermodynamics , optics , composite material , mathematics , geology , oceanography , statistics , stereochemistry
We investigate the effect of steric and hydrodynamic interactions (HI) on quiescent diffusion and flow‐driven transport of finite‐sized nanoparticles through periodic 2D (two‐dimensional) and 3D (three‐dimensional) nanopost arrays using Stokesian dynamics simulations. We find that steric and HI hinder particle diffusivity under quiescent conditions and enhance longitudinal dispersion under flow. Moreover, the presence of HI leads to a power‐law increase in the longitudinal dispersion coefficient with Pe due to spatial variations in the fluid velocity. Lastly, our simulations reveal that longitudinal particle dispersion coefficients behave similarly in 2D and 3D when HI are included.