Evaluation of a coupled model for numerical simulation of a multiphase flow system in a porous medium and a surface fluid

摘要: Numerical simulations that couple flow in a surface fluid with porous medium are useful for examining problems of pollution involve interactions among atmosphere, water, and groundwater, including saltwater intrusion along coasts. Coupled numerical such must consider both vertical between the complicated boundary conditions at their interface. In this study, simulation method coupling Navier-Stokes equations Darcy was developed. Then, basic ability coupled model to reproduce (1) drawdown observed square-pillar experiments, using pillars filled only or (2) migration (salt concentration 0.5%) pillar evaluated. Simulations assumed slippery walls reproduced well results drawdowns 10-30 cm when were packed sand, gas, water. Moreover, infiltration by developed velocity precisely because experimental salt after similar obtained simulation. Furthermore, across satisfied these experiments which predominated. Similarly, system horizontal predominated boundary. Finally, it confirmed present able simulate practical-scale system. All simulations, however, required great deal computational effort, time incremented 0.05- 0.10-s steps. Hereafter, needs be improved so can conducted less effort.