Wang, K, Tan, W, Si, Y et al. (3 more authors) (2024) A solute transport in deformable dual-porosity media using mixture-coupling theory. Environmental Geotechnics, 11 (3). pp. 165-179. ISSN 2051-803X
Abstract
Rock, soil and many porous-like materials are often fractured or structured media, which can exhibit dual-porosity behaviour. Studies on solute transport in deformable dual-porosity media remain challenging due to the multi-physics coupled effects and the complex interaction between fractures (or macropores) and the porous matrix. Although several studies exist on constitutive modelling of coupled behaviour in deformable dual-porosity media, the previously developed models are not systematic in thermodynamical frameworks. This paper proposes a mixture coupling theory approach based on non-equilibrium thermodynamics to develop a solute transport model with consideration of hydromechanical coupling in dual-porosity media (referred to as the ST-HM model). This paper derives the constitutive equations of fully hydromechanical coupled behaviour in dual-porosity media and considers the pore and fracture porosity evolution influenced by both hydraulic and mechanical fields. Therefore, the governing equations of ST-HM are capable of predicting non-reactive solute transport with a fully hydromechanical coupled effect in dual-porosity media. Then, the model was verified against existing models and validated by relevant experimental results. Further, a numerical example shows that the presented model significantly improves the accuracy of the prediction of porosity, fluid pressure and solute concentration compared with previous models, which ignore the fully hydromechanical coupled effects on solute transport.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © ICE Publishing 2023, all rights reserved. This is an author produced version of an article published in Environmental Geotechnics. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | constitutive relations; coupled model; deformable dual-porosity media; geoenvironment; groundwater; mathematical modelling; mixture coupling theory; non-equilibrium thermodynamics; numerical modelling; solute transport |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 22 May 2023 13:16 |
Last Modified: | 11 Nov 2024 13:09 |
Status: | Published |
Publisher: | ICE Publishing |
Identification Number: | 10.1680/jenge.22.00029 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:199365 |