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@article{Fan:2022:10.1016/j.jcis.2022.02.127,
author = {Fan, D and Chapman, E and Khan, A and Iacoviello, F and Mikutis, G and Pini, R and Striolo, A},
doi = {10.1016/j.jcis.2022.02.127},
journal = {Journal of Colloid and Interface Science},
pages = {94--105},
title = {Anomalous transport of colloids in heterogeneous porous media: a multi-scale statistical theory},
url = {http://dx.doi.org/10.1016/j.jcis.2022.02.127},
volume = {617},
year = {2022}
}

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TY  - JOUR
AB  - HypothesisTransport of suspended colloids in heterogeneous porous media is a multi-scale process that exhibits anomalous behavior and cannot be described by the Fickian dispersion theory. Although many studies have documented colloids’ transport at different length scales, a theoretical basis that links pore- to core-scale observations remains lacking. It is hypothesized that a recently proposed pore-scale statistical kinetic theory is able to capture the results observed experimentally.ExperimentsWe implement a multi-scale approach via conducting core-flooding experiments of colloidal particles in a sandstone sample, simulating particles flowing through a sub-volume of the rock’s digital twin, and developing a core-scale statistical theory for particles’ residence times via upscaling the pore-scale kinetic theory. Experimental and computational results for solute transport are used as benchmark.FindingsBased on good agreement across the scales achieved in our investigation, we show that the macroscopically observed anomalous transport is particle-type dependent and stems from particles’ microscopic dispersion and deposition in heterogeneous flow fields. In particular, we reveal that residence-time distributions (i.e., breakthrough curve) obey a closed-form function that encompasses particles’ microscopic dynamics, which allows investigations of a whole transition from pre-asymptotic to asymptotic behavior. The physical insights attained could be useful for interpreting experimental data and designing colloidal tracers.
AU  - Fan,D
AU  - Chapman,E
AU  - Khan,A
AU  - Iacoviello,F
AU  - Mikutis,G
AU  - Pini,R
AU  - Striolo,A
DO  - 10.1016/j.jcis.2022.02.127
EP  - 105
PY  - 2022///
SN  - 0021-9797
SP  - 94
TI  - Anomalous transport of colloids in heterogeneous porous media: a multi-scale statistical theory
T2  - Journal of Colloid and Interface Science
UR  - http://dx.doi.org/10.1016/j.jcis.2022.02.127
UR  - https://www.sciencedirect.com/science/article/pii/S0021979722003599?via%3Dihub
UR  - http://hdl.handle.net/10044/1/95518
VL  - 617
ER  -

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