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Diffusive reactive transport of multicomponent chemicals under coupled thermal, hydraulic, chemical and mechanical conditions

Thomas, Hywel Rhys, Sedighi, Majid and Vardon, Philip James 2012. Diffusive reactive transport of multicomponent chemicals under coupled thermal, hydraulic, chemical and mechanical conditions. Journal of Geotechnical and Geological Engineering 30 (4) , pp. 841-857. 10.1007/s10706-012-9502-9

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Abstract

This paper presents an investigation of the reactive transport of multicomponent chemicals in clays under coupled thermal, hydraulic, chemical and mechanical framework, considering the diffusion processes in detail. More specifically, combined effects due to the electrochemical and the thermal diffusion potentials are investigated. A theoretical framework for coupling thermal diffusion, i.e. the Soret effect, with electrochemical diffusion in a multi-ionic system is provided. An explicit form of a definition for the thermal diffusion coefficient in a multicomponent chemical transport model is developed. Chemical transport is linked to an advanced geochemical model, PHREEQC (version 2), in order to include chemical reactions. The effects of the combined diffusion potentials on the reactive transport of multicomponent chemicals are investigated by a series of numerical simulations of coupled thermal, hydraulic and chemical behaviour.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Advanced Research Computing @ Cardiff (ARCCA)
Engineering
Subjects: Q Science > QE Geology
T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: Coupled model; THCM; Clay Reactive transport Chemical diffusion; Thermal diffusion;
Publisher: Springer
ISSN: 0960-3182
Last Modified: 04 Jun 2017 04:57
URI: http://orca.cf.ac.uk/id/eprint/46825

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