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Title: Accumulation of Colloidal Particles in Flow Junctions Induced by Fluid Flow and Diffusiophoresis

Abstract

The flow of solutions containing solutes and colloidal particles in porous media is widely found in systems including underground aquifers, hydraulic fractures, estuarine or coastal habitats, water filtration systems, etc. In such systems, solute gradients occur when there is a local change in the solute concentration. While the effects of solute gradients have been found to be important for many applications, we observe an unexpected colloidal behavior in porous media driven by the combination of solute gradients and the fluid flow. When two flows with different solute concentrations are in contact near a junction, a sharp solute gradient is formed at the interface, which may allow strong diffusiophoresis of the particles directed against the flow. Consequently, the particles accumulate near the pore entrance, rapidly approaching the packing limit. These colloidal dynamics have important implications for the clogging of a porous medium, where particles that are orders of magnitude smaller than the pore width can accumulate and block the pores within a short period of time. As a result, we also show that this effect can be exploited as a useful tool for preconcentrating biomolecules for rapid bioassays.

Authors:
; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1409141
Alternate Identifier(s):
OSTI ID: 1409252
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Published Article
Journal Name:
Physical Review. X
Additional Journal Information:
Journal Name: Physical Review. X Journal Volume: 7 Journal Issue: 4; Journal ID: ISSN 2160-3308
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Shin, Sangwoo, Ault, Jesse T., Warren, Patrick B., and Stone, Howard A. Accumulation of Colloidal Particles in Flow Junctions Induced by Fluid Flow and Diffusiophoresis. United States: N. p., 2017. Web. doi:10.1103/PhysRevX.7.041038.
Shin, Sangwoo, Ault, Jesse T., Warren, Patrick B., & Stone, Howard A. Accumulation of Colloidal Particles in Flow Junctions Induced by Fluid Flow and Diffusiophoresis. United States. doi:10.1103/PhysRevX.7.041038.
Shin, Sangwoo, Ault, Jesse T., Warren, Patrick B., and Stone, Howard A. Thu . "Accumulation of Colloidal Particles in Flow Junctions Induced by Fluid Flow and Diffusiophoresis". United States. doi:10.1103/PhysRevX.7.041038.
@article{osti_1409141,
title = {Accumulation of Colloidal Particles in Flow Junctions Induced by Fluid Flow and Diffusiophoresis},
author = {Shin, Sangwoo and Ault, Jesse T. and Warren, Patrick B. and Stone, Howard A.},
abstractNote = {The flow of solutions containing solutes and colloidal particles in porous media is widely found in systems including underground aquifers, hydraulic fractures, estuarine or coastal habitats, water filtration systems, etc. In such systems, solute gradients occur when there is a local change in the solute concentration. While the effects of solute gradients have been found to be important for many applications, we observe an unexpected colloidal behavior in porous media driven by the combination of solute gradients and the fluid flow. When two flows with different solute concentrations are in contact near a junction, a sharp solute gradient is formed at the interface, which may allow strong diffusiophoresis of the particles directed against the flow. Consequently, the particles accumulate near the pore entrance, rapidly approaching the packing limit. These colloidal dynamics have important implications for the clogging of a porous medium, where particles that are orders of magnitude smaller than the pore width can accumulate and block the pores within a short period of time. As a result, we also show that this effect can be exploited as a useful tool for preconcentrating biomolecules for rapid bioassays.},
doi = {10.1103/PhysRevX.7.041038},
journal = {Physical Review. X},
number = 4,
volume = 7,
place = {United States},
year = {2017},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevX.7.041038

Citation Metrics:
Cited by: 11 works
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    Works referencing / citing this record:

    Separation of Nano- and Microparticle Flows Using Thermophoresis in Branched Microfluidic Channels
    journal, May 2019

    • Tsuji, Tetsuro; Matsumoto, Yuki; Kugimiya, Ryo
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