Numerical Simulation of Local Scour under a Submarine Pipeline Using a Cartesian Cut Cell Approach

摘要

A two-dimensional numerical model for local scour under a submarinepipeline is established. By using finite volume method with SIMPLECalgorithm, the unsteady Navier-Stokes equations combined with k-ωturbulence model are solved. A cut cell approach enables the model tosimulate the scour process from sitting-on-bed-pipeline status tosuspended-pipeline status without re-generating the mesh inconventional sense. The transports of bed load and suspended load ofuniformly noncohesive sediment are modeled to simulate the localscour process.