Numerical investigation of nanoparticles transport in anisotropic porous media

Handle URI:
http://hdl.handle.net/10754/560566
Title:
Numerical investigation of nanoparticles transport in anisotropic porous media
Authors:
Salama, Amgad ( 0000-0002-4463-1010 ) ; Negara, Ardiansyah ( 0000-0001-5002-4981 ) ; El Amin, Mohamed; Sun, Shuyu ( 0000-0002-3078-864X )
Abstract:
In this work the problem related to the transport of nanoparticles in anisotropic porous media is investigated numerically using the multipoint flux approximation. Anisotropy of porous media properties are an essential feature that exist almost everywhere in subsurface formations. In anisotropic media, the flux and the pressure gradient vectors are no longer collinear and therefore interesting patterns emerge. The transport of nanoparticles in subsurface formations is affected by several complex processes including surface charges, heterogeneity of nanoparticles and soil grain collectors, interfacial dynamics of double-layer and many others. We use the framework of the theory of filtration in this investigation. Processes like particles deposition, entrapment, as well as detachment are accounted for. From the numerical methods point of view, traditional two-point flux finite difference approximation cannot handle anisotropy of media properties. Therefore, in this work we use the multipoint flux approximation (MPFA). In this technique, the flux components are affected by more neighboring points as opposed to the mere two points that are usually used in traditional finite volume methods. We also use the experimenting pressure field approach which automatically constructs the global system of equations by solving multitude of local problems. This approach facilitates to a large extent the construction of the global system. A set of numerical examples is considered involving two-dimensional rectangular domain. A source of nanoparticles is inserted in the middle of the anisotropic layer. We investigate the effects of both anisotropy angle and anisotropy ratio on the transport of nanoparticles in saturated porous media. It is found that the concentration plume and porosity contours follow closely the principal direction of anisotropy of permeability of the central domain.
KAUST Department:
Computational Transport Phenomena Lab; Physical Sciences and Engineering (PSE) Division
Citation:
Numerical investigation of nanoparticles transport in anisotropic porous media 2015 Journal of Contaminant Hydrology
Publisher:
Elsevier BV
Journal:
Journal of Contaminant Hydrology
Issue Date:
13-Jul-2015
DOI:
10.1016/j.jconhyd.2015.06.010
Type:
Article
ISSN:
01697722
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0169772215300036
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Computational Transport Phenomena Lab

Full metadata record

DC FieldValue Language
dc.contributor.authorSalama, Amgaden
dc.contributor.authorNegara, Ardiansyahen
dc.contributor.authorEl Amin, Mohameden
dc.contributor.authorSun, Shuyuen
dc.date.accessioned2015-07-16T14:07:38Zen
dc.date.available2015-07-16T14:07:38Zen
dc.date.issued2015-07-13en
dc.identifier.citationNumerical investigation of nanoparticles transport in anisotropic porous media 2015 Journal of Contaminant Hydrologyen
dc.identifier.issn01697722en
dc.identifier.doi10.1016/j.jconhyd.2015.06.010en
dc.identifier.urihttp://hdl.handle.net/10754/560566en
dc.description.abstractIn this work the problem related to the transport of nanoparticles in anisotropic porous media is investigated numerically using the multipoint flux approximation. Anisotropy of porous media properties are an essential feature that exist almost everywhere in subsurface formations. In anisotropic media, the flux and the pressure gradient vectors are no longer collinear and therefore interesting patterns emerge. The transport of nanoparticles in subsurface formations is affected by several complex processes including surface charges, heterogeneity of nanoparticles and soil grain collectors, interfacial dynamics of double-layer and many others. We use the framework of the theory of filtration in this investigation. Processes like particles deposition, entrapment, as well as detachment are accounted for. From the numerical methods point of view, traditional two-point flux finite difference approximation cannot handle anisotropy of media properties. Therefore, in this work we use the multipoint flux approximation (MPFA). In this technique, the flux components are affected by more neighboring points as opposed to the mere two points that are usually used in traditional finite volume methods. We also use the experimenting pressure field approach which automatically constructs the global system of equations by solving multitude of local problems. This approach facilitates to a large extent the construction of the global system. A set of numerical examples is considered involving two-dimensional rectangular domain. A source of nanoparticles is inserted in the middle of the anisotropic layer. We investigate the effects of both anisotropy angle and anisotropy ratio on the transport of nanoparticles in saturated porous media. It is found that the concentration plume and porosity contours follow closely the principal direction of anisotropy of permeability of the central domain.en
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0169772215300036en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Contaminant Hydrology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Contaminant Hydrology, 13 July 2015. DOI: 10.1016/j.jconhyd.2015.06.010en
dc.subjectNanoparticles transporten
dc.subjectanisotropic porous mediaen
dc.subjectfiltration theoryen
dc.subjectMultipoint flux approximationen
dc.titleNumerical investigation of nanoparticles transport in anisotropic porous mediaen
dc.typeArticleen
dc.contributor.departmentComputational Transport Phenomena Laben
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of Contaminant Hydrologyen
dc.eprint.versionPost-printen
kaust.authorSalama, Amgaden
kaust.authorNegara, Ardiansyahen
kaust.authorEl-Amin, Mohameden
kaust.authorSun, Shuyuen
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