Simulations of a coupled hydro-chemo-mechanical system in rocks |
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Authors: | Jishan Liu Barry H. Brady |
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Affiliation: | (1) School of Oil & Gas Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, Western, Australia, 6009;(2) Faculty of Engineering, Computing and Mathematics, The University of Western Australia, 35 Stirling Highway, Crawley, Western, Australia, 6009 |
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Abstract: | A coupled hydro-chemo-mechanical numerical model is developed for these coupled phenomena in many engineering fields. The model has been applied to predicting the response of a stressed rockmass column to an injected reactive fluid (reagent) flow. The response includes evolutions of porosity, permeability, reagent and mineral concentrations during dissolution. In the model, the progress of dissolution is defined by the change in porosity ratio and the porosity increases with dissolution assuming there is no precipitation. The numerical evolutions of porosity, permeability, reagent and mineral concentrations during dissolution are validated against steady state solutions. The model results show that these evolutions are regulated to a certain extent by the applied external loadings: an applied extensional stress enhances the progress of the dissolution process while an applied compression stress slows the progress of the dissolution process. This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | coupled processes deformation dissolution numerical solution permeability porosity |
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