A coupled LBM-DEM method for simulating the multiphase fluid-solid interaction problem

• A numerical scheme is proposed for the direct simulation of complex solid-liquid-gas three-phase flows. coupled LBM-DEM model ensuring mass conservation proposed. The upward migration bubbles through a brine-filled sediment column successfully simulated at various conditions. Simulation results indicate three different flow regimes: connected finger flow, transition and dispersed bubbly flow. dimensionless EO WE numbers can identify regimes. In this paper, we develop simulating in unconsolidated particle layers. Based on discrete element method (DEM) multiphase fluid framework lattice Boltzmann (LBM), fluid-solid two-way coupling algorithm model, fluid-fluid interface tracked using phase-field method, fluid-particle interaction tackled by combination momentum exchange field immersed boundary phase field. We applied to simulate leaked gas seafloor, investigated influences leak rate interfacial tension bubble rising behavior. These regimes be distinguished Eötvös Weber numbers. accurately characterize mechanisms mesoscopic scale has powerful advantages problems.