Particle resolved simulation of sediment transport by a hybrid parallel approach

Sediment transport over an erodible sediment bed is studied by particle resolved simulations with a hybrid parallel approach. To overcome the challenges of load imbalance in traditional domain decomposition method when encountering highly uneven distributions particles transport, approach Darmana et al.(2006) originally developed for point modified and implemented into simulations. A novel memory optimization technique proposed to reduce requirement spherical equal size. The present shows good scalability high efficiency challenging test case more than million particles. Our code validated several benchmark cases, results show agreement experimental computational data literature. Furthermore, turbulent flow simulated. An extraction distinguish saltating rolling extract impact rebound information particle-mobile interaction. probability distribution functions (PDF) saltation parameters such as velocity, angle, spanwise angular velocity events are presented. Splash established interaction flow, which was rarely investigated experiments helpful model complex particle-bed interactions flow.