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Random-walk modeling of reactive transport in porous media with a reduced-order chemical basis of conservative components

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10.1029/2020WR028679
 
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hdl:2117/353052

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Solé Marí, Guillem
Schmidt, Michael J.
Bolster, Diogo
Fernández García, DanielMés informacióMés informacióMés informació
Document typeArticle
Defense date2021-04
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
ProjectLAS NECESIDADES DE AGUA, LA DISPONIBILIDAD, LA CALIDAD Y LA SOSTENIBILIDAD (MINECO-PCIN-2015-248)
INCREMENTO EN LA DEGRADACION DE COMPUESTOS EMERGENTES MEDIANTE FLUJO CAOTICO EN SISTEMAS DE RECARGA ARTIFICIAL Y EVALUACION DEL RIESGO ASOCIADO (MINECO-CGL2015-69768-R)
Abstract
In this work we employ a reduced-order basis of conservative chemical components to model reactive transport using a Lagrangian (particle tracking) method. While this practice is well-understood in the Eulerian (grid-based) context, its adaptation to a Lagrangian context requires a novel reformulation of particle transport properties. Because the number of conservative-species particles need not change during simulation, spatial resolution stays constant in time, and there is no increase in computational expense due to increasing numbers of product particles. Additionally, this treatment simplifies the interaction between equilibrium and kinetic reactions and allows the use of species-dependent transport operators at the same time. We apply this method to model a suite of simple test problems that include equilibrium and kinetic reactions, and results exhibit excellent match with base-case Eulerian results. Finally, we apply the new method to model a 2D problem concerning the mobilization of cadmium by a CO2 leak, showing the potential applicability of the proposed methodology.
CitationSole-Mari, G. [et al.]. Random-walk modeling of reactive transport in porous media with a reduced-order chemical basis of conservative components. "Water resources research", Abril 2021, vol. 57, núm. 4, p. e2020WR028679:1-e2020WR028679:19. 
URIhttp://hdl.handle.net/2117/353052
DOI10.1029/2020WR028679
ISSN0043-1397
Publisher versionhttps://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020WR028679
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  • Departament d'Enginyeria Civil i Ambiental - Articles de revista [2.501]
  • GHS - Grup d'Hidrologia Subterrània - Articles de revista [190]
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