Ma, Y, Chen, X orcid.org/0000-0002-2053-2448, Hosking, LJ et al. (2 more authors) (2022) THMC constitutive model for membrane geomaterials based on Mixture Coupling Theory. International Journal of Engineering Science, 171. 103605. ISSN 0020-7225
Abstract
Modelling of coupled thermal (T), hydro (H), mechanical (M) and chemical (C) processes in geomaterials has attracted attention in the past decades due to many significant contemporary engineering applications such as nuclear waste disposal, carbon capture and storage etc. However, in very-low permeability membrane geomaterials, the couplings between chemical osmosis and thermal osmosis and their consequent influence on temperature, water transport and mechanical deformation remain as a long-lasting challenge due to the gap between geomechanics and geochemistry. This paper extends Mixture Coupling Theory by bridging the chemical-thermal field based on non-equilibrium thermodynamics, and develops a new constitutive THMC fully-coupled model incorporating the interactions between chemical and thermal osmosis. Classic Darcy's law has been fundamentally extended with osmosis as the major driving force of the diffusion process. A simple numerical simulation used for the demonstration purpose has illustrated that the couplings between chemical and thermal osmosis will significantly change the water flow directions, consequently influencing the saturation variation and mechanical deformation.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 Elsevier Ltd. All rights reserved. This is an author produced version of an article published in International Journal of Engineering Science. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | THMC model; Diffusion; Non-equilibrium thermodynamics; Thermo osmosis; Chemical osmosis |
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: | 16 Dec 2021 11:20 |
Last Modified: | 26 Nov 2022 01:13 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.ijengsci.2021.103605 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:181283 |
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Filename: V20-THMC-thermo and chemical osmosis.pdf
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