Documents disponibles écrits par cet auteur

Inclusion of some aspects of chemical behavior of unsaturated soil in thermo/hydro/chemical/mechanical models. I / P. J. Cleall in Journal of engineering mechanics, Vol. 133 N°3 (Mars 2007) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 133 N°3 (Mars 2007) . - pp.338–347. Titre : Inclusion of some aspects of chemical behavior of unsaturated soil in thermo/hydro/chemical/mechanical models. I : model development Type de document : texte imprimé Auteurs : P. J. Cleall, Auteur ; S. C. Seetharam, Auteur ; H. R. Thomas, Auteur Année de publication : 2007 Article en page(s) : pp.338–347. Note générale : Applied mechanics Langues : Anglais (eng) Mots-clés : Unsaturated  soils,  Numerical  models,  Soil  deformation,  Bentonite  Nuclear  wastes  Chemical  equilibrium  Transport  phenomena Résumé : This paper presents an investigation of the inclusion of some aspects of chemical behavior within a model of coupled thermo/hydro/chemical/mechanical behavior of unsaturated soils. In particular, multicomponent reactive chemical transport behavior is addressed. The chemical transport model is based on the advection/dispersion/reaction equation, while geochemical reactions are considered via coupling with an established geochemical speciation model. A numerical solution of the governing differential equations is achieved by the use of the Galerkin-weighted residual method for spatial discretization and an implicit backward Eulerian finite-difference method for temporal discretization. The solution of the geochemical reactions is achieved externally to the main solution procedure. Coupling between the chemical transport and geochemical models is achieved via the implementation of both sequential iterative and sequential noniterative techniques. Three application problems are then presented to demonstrate the capability of the coupled model. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A3%2833 [...] [article] Inclusion of some aspects of chemical behavior of unsaturated soil in thermo/hydro/chemical/mechanical models. I : model development [texte imprimé] / P. J. Cleall, Auteur ; S. C. Seetharam, Auteur ; H. R. Thomas, Auteur . - 2007 . - pp.338–347. Applied mechanics Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 133 N°3 (Mars 2007) . - pp.338–347. Mots-clés : Unsaturated  soils,  Numerical  models,  Soil  deformation,  Bentonite  Nuclear  wastes  Chemical  equilibrium  Transport  phenomena Résumé : This paper presents an investigation of the inclusion of some aspects of chemical behavior within a model of coupled thermo/hydro/chemical/mechanical behavior of unsaturated soils. In particular, multicomponent reactive chemical transport behavior is addressed. The chemical transport model is based on the advection/dispersion/reaction equation, while geochemical reactions are considered via coupling with an established geochemical speciation model. A numerical solution of the governing differential equations is achieved by the use of the Galerkin-weighted residual method for spatial discretization and an implicit backward Eulerian finite-difference method for temporal discretization. The solution of the geochemical reactions is achieved externally to the main solution procedure. Coupling between the chemical transport and geochemical models is achieved via the implementation of both sequential iterative and sequential noniterative techniques. Three application problems are then presented to demonstrate the capability of the coupled model. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A3%2833 [...]

Inclusion of some aspects of chemical behavior of unsaturated soil in thermo/hydro/chemical/mechanical models. II / P. J. Cleall in Journal of engineering mechanics, Vol. 133 N°3 (Mars 2007) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 133 N°3 (Mars 2007) . - pp.348–356. Titre : Inclusion of some aspects of chemical behavior of unsaturated soil in thermo/hydro/chemical/mechanical models. II : application and transport of soluble salts in compacted bentonite Type de document : texte imprimé Auteurs : P. J. Cleall, Auteur ; S. C. Seetharam, Auteur ; H. R. Thomas, Auteur Année de publication : 2007 Article en page(s) : pp.348–356. Note générale : Applied mechanics Langues : Anglais (eng) Mots-clés : Unsaturated  soils  Numerical  models  Soil  deformation  Nuclear  wastes  Chemical  equilibrium  Transport  phenomena Résumé : This paper presents an application of a coupled thermo/hydro/chemical/mechanical model via simulation of a laboratory experiment in order to investigate the transport behavior of ions in bentonite pore water. Chemical reactions considered include ion exchange reactions involving major cations ( Na+ , K+ , Mg2+ , and Ca2+ ) and precipitation-dissolution of trace minerals (calcite, dolomite, anhydrite, and halite). The following conclusions are drawn based on the numerical results. The development of both the temperature and moisture fields was captured by simulation, and a good correlation with the experimental water uptake results was observed. For all ions, the model showed a good qualitative and reasonable quantitative agreement with the experimental results. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A3%2834 [...] [article] Inclusion of some aspects of chemical behavior of unsaturated soil in thermo/hydro/chemical/mechanical models. II : application and transport of soluble salts in compacted bentonite [texte imprimé] / P. J. Cleall, Auteur ; S. C. Seetharam, Auteur ; H. R. Thomas, Auteur . - 2007 . - pp.348–356. Applied mechanics Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 133 N°3 (Mars 2007) . - pp.348–356. Mots-clés : Unsaturated  soils  Numerical  models  Soil  deformation  Nuclear  wastes  Chemical  equilibrium  Transport  phenomena Résumé : This paper presents an application of a coupled thermo/hydro/chemical/mechanical model via simulation of a laboratory experiment in order to investigate the transport behavior of ions in bentonite pore water. Chemical reactions considered include ion exchange reactions involving major cations ( Na+ , K+ , Mg2+ , and Ca2+ ) and precipitation-dissolution of trace minerals (calcite, dolomite, anhydrite, and halite). The following conclusions are drawn based on the numerical results. The development of both the temperature and moisture fields was captured by simulation, and a good correlation with the experimental water uptake results was observed. For all ions, the model showed a good qualitative and reasonable quantitative agreement with the experimental results. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A3%2834 [...]