• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Institut de Mécanique et d’Ingénierie de Bordeaux (I2M)
  • View Item
  • Home
  • Institut de Mécanique et d’Ingénierie de Bordeaux (I2M)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Two-domain description of solute transport in heterogeneous porous media: Comparison between theoretical predictions and numerical experiments

Article dans une revue avec comité de lecture
Author
CHERBLANC, Fabien
693 Laboratoire de Mécanique et Génie Civil [LMGC]
ccAHMADI-SENICHAULT, Azita
QUINTARD, Michel
690 Institut de mécanique des fluides de Toulouse [IMFT]

URI
http://hdl.handle.net/10985/9723
Date
2007
Journal
Advances in Water Resources

Abstract

This paper deals with two-equation models describing solute transport in highly heterogeneous porous systems and more particularly dual permeability structures composed of high- and low-permeability regions. A macroscopic two-equation model has been previously proposed in the literature based on the volume averaging technique [Ahmadi A, Quintard M, Whitaker S. Transport in chemically and mechanically heterogeneous porous media V: two-equation model for solute transport with adsorption, Adv Water Resour 1998;22:59–86; Cherblanc F, Ahmadi A, Quintard M. Two-medium description of dispersion in heterogeneous porous media : calculation of macroscopic properties. Water Resour Res 2003;39(6):1154–73]. Through this theoretical upscaling method, both convection and dispersion mechanisms are taken into account in both regions, allowing one to deal with a large range of heterogeneous systems. In this paper, the numerical tools associated with this model are developed in order to test the theory by comparing macroscopic concentration fields to those obtained by Darcy-scale numerical experiments. The heterogeneous structures considered are made up of lowpermeability nodules embedded in a continuous high-permeability region. Several permeability ratios are used, leading to very different macroscopic behaviours. Taking advantage of the Darcy-scale simulations, the role of convection and dispersion in the mass exchange between the two regions is investigated. Large-scale averaged concentration fields and elution curves are extracted from the Darcy-scale numerical experiments and compared to the theoretical predictions given by the two-equation model. Very good agreement is found between experimental and theoretical results. A permeability ratio around 100 presents a behaviour characteristic of ‘‘mobile–mobile’’ systems emphasizing the relevance of this two-equation description. Eventually, the theory is used to set-up a criterion for the existence of local equilibrium conditions. The potential importance of local-scale dispersion in reducing large-scale dispersion is highlighted. The results also confirm that a non-equilibrium description may be necessary in such systems, even if local-equilibrium behaviour could be observed.

Files in this item

Name:
TREFLE_AWR_Ahmadi-2007.pdf
Size:
987.0Kb
Format:
PDF
View/Open

Collections

  • Institut de Mécanique et d’Ingénierie de Bordeaux (I2M)

Related items

Showing items related by title, author, creator and subject.

  • Gravity-driven remediation of DNAPL polluted aquifers using densified biopolymer brine solution 
    Article dans une revue avec comité de lecture
    ccALAMOOTI, Amir; ccCOLOMBANO, Stéfan; ccDAVARZANI, Dorian; ccLION, Fabien; ccAHMADI-SENICHAULT, Azita (Elsevier BV, 2024-03)
    Polymer solutions aid DNAPL (Dense Non Aqueous Phase Liquid)-contaminated soil remediation but are impacted by gravity and viscous forces. This study assesses the interplay between buoyancy and viscous forces in influencing ...
  • Enhancing remediation of residual DNAPL in multilayer aquifers: Post-injection of alcohol-surfactant-polymer mixtures 
    Article dans une revue avec comité de lecture
    ccALAMOOTI, Amir; COLOMBANO, Stéfan; SHOKER, Abbas; ccAHMADI-SENICHAULT, Azita; LION, Fabien; CAZAUX, David; MARION, Cédric; LAGRON, Jérôme; SAWADOGO, Idriss; DAVARZANI, Dorian (Elsevier BV, 2024-03)
    Although polymer-surfactant injection is an effective remediation technology for multilayer aquifers contaminated by Dense Non-Aqueous Phase Liquids (DNAPL), the existence of residual DNAPL after treatment is inevitable. ...
  • Remediation of multilayer soils contaminated by heavy chlorinated solvents using biopolymer-surfactant mixtures: Two-dimensional flow experiments and simulations 
    Article dans une revue avec comité de lecture
    ccALAMOOTI, Amir; COLOMBANO, Stéfan; GLABE, Zakari Abdullaziz; LION, Fabien; DAVARZANI, Dorian; ccAHMADI-SENICHAULT, Azita (Elsevier BV, 2023-09)
    To assess the efficiency of remediating dense non-aqueous phase liquids (DNAPLs), here heavy chlorinated solvents, through injection of xanthan solutions with or without surfactant (sodium dodecylbenzenesulfonate: SDBS), ...
  • Influence of the injection of densified polymer suspension on the efficiency of DNAPL displacement in contaminated saturated soils 
    Article dans une revue avec comité de lecture
    ccMOHAMMADI ALAMOOTI, Amir Hossein; COLOMBANO, Stéfan; OMIRBEKOV, Sagyn; ccAHMADI-SENICHAULT, Azita; LION, Fabien; DAVARZANI, Hossein (Elsevier BV, 2022-10)
    Nowadays the remediation of DNAPL contaminated zones near groundwater has gained great prominence in environmental fields due to the high importance of water resources. In this work, we suggest injecting a densified polymer ...
  • Origin of the inertial deviation from Darcy's law: An investigation from a microscopic flow analysis on two-dimensional model structures 
    Article dans une revue avec comité de lecture
    AGNAOU, Mehrez; LASSEUX, Didier; ccAHMADI-SENICHAULT, Azita (American Physical Society (APS), 2017)
    Inertial flow in porous media occurs in many situations of practical relevance among which one can cite flows in column reactors, in filters, in aquifers, or near wells for hydrocarbon recovery. It is characterized by a ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales