Abstract
A coupled transport model of thermo-hydro-mechanical two-phase flow in saturated porous media was established based on granular thermodynamics and Newton's second law. This model includes the entropy change generated by material entering and exiting the open system, as well as the solid-liquid relative velocity in the dissipative system, to derive the seepage field equation. Furthermore, it accounted for thermal conduction, porosity changes resulting from suspended particle deposition and soil deformation, and the adsorption-desorption of pollutants by soil particles and suspended particles. To evaluate the model, a sensitivity analysis was conducted. Subsequently, the calculated and experimental results are compared by various scenarios, including different types of pollutants, injection concentrations, and initial seepage velocities. The results indicated that this model accurately describes the transport process and residual distribution of pollutants, as well as the continuous injection of coupled two-phase flow, and effectively predicted the coupled transport process of pollutants and suspended particles, which has strong practicality.
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