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Thermo-hydro-salt-mechanical coupled model for saturated porous media based on crystallization kinetics
AbstractCrystallization is generally considered as the most destructive factor of porous material, but few studies have reported the coupling effects among fluid flow, heat transfer, crystallization and deformation in porous media. In this paper, the driving forces of phase transition were studied initially and then the crystallization kinetics models were established. Moreover, constitutive relations related to saline frozen soil were discussed, and the expression of unfrozen water content in non-equilibrium state was improved. Finally, a thermo-hydro-salt-mechanical coupled model for fully saturated saline frozen soil with phase change was proposed. Validation of the model is illustrated by comparisons between the simulation and experimental results. The predicted values of frost heave, temperature and moisture distribution are consistent with the experimental data, and it is demonstrated that the presented crystallization kinetics approach is valid for studying heat and mass transfer coupled problem with phase change in porous media.
HighlightsCrystallization kinetics models for crystal growth are established.Expression of unfrozen water content in non-equilibrium state is improved.A thermo-hydro-salt-mechanical coupled model with phase change is proposed.The proposed model is used to predict successfully the behaviors of saline frozen soil.
Thermo-hydro-salt-mechanical coupled model for saturated porous media based on crystallization kinetics
AbstractCrystallization is generally considered as the most destructive factor of porous material, but few studies have reported the coupling effects among fluid flow, heat transfer, crystallization and deformation in porous media. In this paper, the driving forces of phase transition were studied initially and then the crystallization kinetics models were established. Moreover, constitutive relations related to saline frozen soil were discussed, and the expression of unfrozen water content in non-equilibrium state was improved. Finally, a thermo-hydro-salt-mechanical coupled model for fully saturated saline frozen soil with phase change was proposed. Validation of the model is illustrated by comparisons between the simulation and experimental results. The predicted values of frost heave, temperature and moisture distribution are consistent with the experimental data, and it is demonstrated that the presented crystallization kinetics approach is valid for studying heat and mass transfer coupled problem with phase change in porous media.
HighlightsCrystallization kinetics models for crystal growth are established.Expression of unfrozen water content in non-equilibrium state is improved.A thermo-hydro-salt-mechanical coupled model with phase change is proposed.The proposed model is used to predict successfully the behaviors of saline frozen soil.
Thermo-hydro-salt-mechanical coupled model for saturated porous media based on crystallization kinetics
Wu, Daoyong (Autor:in) / Lai, Yuanming (Autor:in) / Zhang, Mingyi (Autor:in)
Cold Regions, Science and Technology ; 133 ; 94-107
31.10.2016
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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