FLOW AND SEDIMENT TRANSPORT AROUND IMPERMEABLE OR PERMEABLE GROINS

Abstract

This paper presents the results obtained from the studies on turbulent flow and bed deformation around groins with experimental and numerical methods. Two impermeable or permeable groins were positioned on the left side of the model channel. The velocity distributions around the groins were measured under non-submerged conditions. In the case with impermeable groins, the local scour hole around the upstream groin resulted deeper than that of the case with permeable ones. A 3D numerical model based on unstructured meshes was developed. The numerical results for velocity distributions have been compared with those of the experimental measurements and show good agreement with the experimental data.