Electro-osmosis of non-Newtonian fluids in porous media using lattice Poisson–Boltzmann method

[Display omitted] •Electro-osmotic permeability of non-Newtonian fluid varies with external electric field magnitude.•Shear-thinning fluid and shear-thickening fluid exhibit different electro-osmotic permeability dependent on porosity.•Fluids with different properties show different correlations bet...

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Veröffentlicht in:Journal of colloid and interface science 2014-12, Vol.436 (436), p.186-193
Hauptverfasser: Chen, Simeng, He, Xinting, Bertola, Volfango, Wang, Moran
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container_title Journal of colloid and interface science
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creator Chen, Simeng
He, Xinting
Bertola, Volfango
Wang, Moran
description [Display omitted] •Electro-osmotic permeability of non-Newtonian fluid varies with external electric field magnitude.•Shear-thinning fluid and shear-thickening fluid exhibit different electro-osmotic permeability dependent on porosity.•Fluids with different properties show different correlations between permeability and microstructure morphology. Electro-osmosis in porous media has many important applications in various areas such as oil and gas exploitation and biomedical detection. Very often, fluids relevant to these applications are non-Newtonian because of the shear-rate dependent viscosity. The purpose of this study was to investigate the behaviors and physical mechanism of electro-osmosis of non-Newtonian fluids in porous media. Model porous microstructures (granular, fibrous, and network) were created by a random generation-growth method. The nonlinear governing equations of electro-kinetic transport for a power-law fluid were solved by the lattice Poisson–Boltzmann method (LPBM). The model results indicate that: (i) the electro-osmosis of non-Newtonian fluids exhibits distinct nonlinear behaviors compared to that of Newtonian fluids; (ii) when the bulk ion concentration or zeta potential is high enough, shear-thinning fluids exhibit higher electro-osmotic permeability, while shear-thickening fluids lead to the higher electro-osmotic permeability for very low bulk ion concentration or zeta potential; (iii) the effect of the porous medium structure depends significantly on the constitutive parameters: for fluids with large constitutive coefficients strongly dependent on the power-law index, the network structure shows the highest electro-osmotic permeability while the granular structure exhibits the lowest permeability on the entire range of power law indices considered; when the dependence of the constitutive coefficient on the power law index is weaker, different behaviors can be observed especially in case of strong shear thinning.
doi_str_mv 10.1016/j.jcis.2014.08.048
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Electro-osmosis in porous media has many important applications in various areas such as oil and gas exploitation and biomedical detection. Very often, fluids relevant to these applications are non-Newtonian because of the shear-rate dependent viscosity. The purpose of this study was to investigate the behaviors and physical mechanism of electro-osmosis of non-Newtonian fluids in porous media. Model porous microstructures (granular, fibrous, and network) were created by a random generation-growth method. The nonlinear governing equations of electro-kinetic transport for a power-law fluid were solved by the lattice Poisson–Boltzmann method (LPBM). The model results indicate that: (i) the electro-osmosis of non-Newtonian fluids exhibits distinct nonlinear behaviors compared to that of Newtonian fluids; (ii) when the bulk ion concentration or zeta potential is high enough, shear-thinning fluids exhibit higher electro-osmotic permeability, while shear-thickening fluids lead to the higher electro-osmotic permeability for very low bulk ion concentration or zeta potential; (iii) the effect of the porous medium structure depends significantly on the constitutive parameters: for fluids with large constitutive coefficients strongly dependent on the power-law index, the network structure shows the highest electro-osmotic permeability while the granular structure exhibits the lowest permeability on the entire range of power law indices considered; when the dependence of the constitutive coefficient on the power law index is weaker, different behaviors can be observed especially in case of strong shear thinning.</description><identifier>ISSN: 0021-9797</identifier><identifier>EISSN: 1095-7103</identifier><identifier>DOI: 10.1016/j.jcis.2014.08.048</identifier><identifier>PMID: 25278358</identifier><identifier>CODEN: JCISA5</identifier><language>eng</language><publisher>Amsterdam: Elsevier Inc</publisher><subject>Chemistry ; Colloidal state and disperse state ; Computational fluid dynamics ; Electro-osmosis ; Electrochemical Techniques - methods ; Electrochemistry ; Exact sciences and technology ; Fluid flow ; Fluids ; General and physical chemistry ; Kinetics ; Lattice Poisson–Boltzmann method ; Mathematical models ; Media ; Miscellaneous (electroosmosis, electrophoresis, electrochromism, electrocrystallization, ...) ; Models, Theoretical ; Networks ; Non Newtonian fluids ; Non-Newtonian fluid ; Osmosis ; Permeability ; Porous materials ; Porous media ; Rheology</subject><ispartof>Journal of colloid and interface science, 2014-12, Vol.436 (436), p.186-193</ispartof><rights>2014 Elsevier Inc.</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © 2014 Elsevier Inc. 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Electro-osmosis in porous media has many important applications in various areas such as oil and gas exploitation and biomedical detection. Very often, fluids relevant to these applications are non-Newtonian because of the shear-rate dependent viscosity. The purpose of this study was to investigate the behaviors and physical mechanism of electro-osmosis of non-Newtonian fluids in porous media. Model porous microstructures (granular, fibrous, and network) were created by a random generation-growth method. The nonlinear governing equations of electro-kinetic transport for a power-law fluid were solved by the lattice Poisson–Boltzmann method (LPBM). 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He, Xinting ; Bertola, Volfango ; Wang, Moran</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c419t-56dfa8352c6820560cf0c550fdcf83f0daa2a3ca87ed00417dcab5f8f7bb9e363</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Computational fluid dynamics</topic><topic>Electro-osmosis</topic><topic>Electrochemical Techniques - methods</topic><topic>Electrochemistry</topic><topic>Exact sciences and technology</topic><topic>Fluid flow</topic><topic>Fluids</topic><topic>General and physical chemistry</topic><topic>Kinetics</topic><topic>Lattice Poisson–Boltzmann method</topic><topic>Mathematical models</topic><topic>Media</topic><topic>Miscellaneous (electroosmosis, electrophoresis, electrochromism, electrocrystallization, ...)</topic><topic>Models, Theoretical</topic><topic>Networks</topic><topic>Non Newtonian fluids</topic><topic>Non-Newtonian fluid</topic><topic>Osmosis</topic><topic>Permeability</topic><topic>Porous materials</topic><topic>Porous media</topic><topic>Rheology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Simeng</creatorcontrib><creatorcontrib>He, Xinting</creatorcontrib><creatorcontrib>Bertola, Volfango</creatorcontrib><creatorcontrib>Wang, Moran</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of colloid and interface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, Simeng</au><au>He, Xinting</au><au>Bertola, Volfango</au><au>Wang, Moran</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electro-osmosis of non-Newtonian fluids in porous media using lattice Poisson–Boltzmann method</atitle><jtitle>Journal of colloid and interface science</jtitle><addtitle>J Colloid Interface Sci</addtitle><date>2014-12-15</date><risdate>2014</risdate><volume>436</volume><issue>436</issue><spage>186</spage><epage>193</epage><pages>186-193</pages><issn>0021-9797</issn><eissn>1095-7103</eissn><coden>JCISA5</coden><abstract>[Display omitted] •Electro-osmotic permeability of non-Newtonian fluid varies with external electric field magnitude.•Shear-thinning fluid and shear-thickening fluid exhibit different electro-osmotic permeability dependent on porosity.•Fluids with different properties show different correlations between permeability and microstructure morphology. 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subjects Chemistry
Colloidal state and disperse state
Computational fluid dynamics
Electro-osmosis
Electrochemical Techniques - methods
Electrochemistry
Exact sciences and technology
Fluid flow
Fluids
General and physical chemistry
Kinetics
Lattice Poisson–Boltzmann method
Mathematical models
Media
Miscellaneous (electroosmosis, electrophoresis, electrochromism, electrocrystallization, ...)
Models, Theoretical
Networks
Non Newtonian fluids
Non-Newtonian fluid
Osmosis
Permeability
Porous materials
Porous media
Rheology
title Electro-osmosis of non-Newtonian fluids in porous media using lattice Poisson–Boltzmann method
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