Numerical Models in GPGPU for the treatment of erodible beds

Abstract

In this work, algorithms and numerical simulations of three-dimensional fluid flows coupled with sediment transport are used to reproduce the processes of erosion and sedimentation. A solver for the NS (Navier Stokes) equations in domains with moving bed is implemented. The FS (Fractional Step) algorithm is used to solve the incompressible fluid. The change in sediment bed morphology is modeled using the Exner equation, which is discretized and coupled with the discrete fluid model. For sediment, only bed load transport is considered. The implementation is done using parallel computation techniques in general purpose graphics processing units (GPGPU).