A novel DEM-based pore-scale thermal-hydro-mechanical model for fractured non-saturated porous materials

Abstract For fracture propagation, a novel DEM-based pore-scale thermal-hydro-mechanical model of two-phase fluid flow with heat transfer in non-saturated porous materials low porosity was developed. Numerical computations were performed for bonded granular specimens, using DEM fully coupled CFD (based on network) and transfer, which integrated discrete mechanics at the meso-scale. Both (diffusion advection) particles (conduction) involved transfer. The numerical findings thermal-hydraulic-mechanical (THM) first compared to analytical solution classic 1D transport problem. outcomes perfect agreement. Advection's impacts cooling particle assembly next numerically demonstrated high Peclet numbers. Finally, THM model's utility proved thermal contraction test employing during cooling, resulted creation macro-crack. effects macro-crack distribution pressure, density, velocity, temperature studied.