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author:

Cai, Peifu (Cai, Peifu.) [1] | Yan, Huaxiang (Yan, Huaxiang.) [2] | Sedighi, Majid (Sedighi, Majid.) [3] | Jivkov, Andrey (Jivkov, Andrey.) [4] | Xiong, Qingrong (Xiong, Qingrong.) [5] | Wang, Hao (Wang, Hao.) [6]

Indexed by:

EI SCIE

Abstract:

Modeling reactive transport in discontinuous and heterogeneous porous media is key to the understanding of geochemical systems. Integral formulations of conservation equations can be an alternative approach to solving transport problems in such complex media compared to the classical local (differential) formulations. A prominent example is Peridynamics. However, it has been developed only for advection-dispersion transport with a simple bimolecular reaction, which is of limited utility in complex geochemical problems in real environments. This study integrates bond-based Peridynamics with advanced geochemical modeling (PHREEQC), enabling accurate simulation of reactive transport in heterogeneous porous systems, overcoming limitations in grid-based discretization methods. The sequential non-iterative approach is introduced to address the coupling between the transport of chemical species (solved by Peridynamics) and geochemical reactions (solved by PHREEQC). The proposed model is verified with a set of benchmarks. A series of cases is studied to show the model's capabilities in the prediction of reactive transport in porous media with fractures and heterogeneities (e.g., permeable and impermeable inclusions). The current model can be used to quantify the impact of the permeable/non-permeable inclusions on non-uniform solution migration and sharp fronts of mineral precipitation/dissolution without any refinements and modifications at the interface. The PD reactive transport also captures the influences of fractures in accelerating the solute transport and enhancing the mineral reaction rate. The current multi-physics nonlocal reactive transport formulations can be easily extended to study more complex problems, such as reactive flow-mechanical process coupled behavior and accurate description of the mineral dissolution/precipitation interface at the micro-scale.

Keyword:

Discontinuous Heterogeneous Peridynamics Porous media Reactive Transport

Community:

  • [ 1 ] [Cai, Peifu]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Fujian, Peoples R China
  • [ 2 ] [Yan, Huaxiang]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Fujian, Peoples R China
  • [ 3 ] [Wang, Hao]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Fujian, Peoples R China
  • [ 4 ] [Cai, Peifu]Great Bay Univ, Sch Adv Engn, Dongguan 52300, Guangdong, Peoples R China
  • [ 5 ] [Sedighi, Majid]Univ Manchester, Sch Engn, Dept Solids & Struct, Oxford Rd, Manchester M13 9PL, England
  • [ 6 ] [Jivkov, Andrey]Univ Manchester, Sch Engn, Dept Solids & Struct, Oxford Rd, Manchester M13 9PL, England
  • [ 7 ] [Xiong, Qingrong]Shandong Univ, Sch Civil Engn, Jinan 250000, Peoples R China

Reprint 's Address:

  • [Yan, Huaxiang]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Fujian, Peoples R China

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Source :

COMPUTERS AND GEOTECHNICS

ISSN: 0266-352X

Year: 2025

Volume: 188

5 . 3 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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