Investigation of Local Scour in Cohesionless Sediments Using a Tunnel-Model

摘要

Two dimensional sand erosion tests in a closed water tunnel (velocities up to 2 m/s) produced a scour hole downstream a sill or a flat bottom protection, the slope of the scour hole being independent of flow velocity, partially dependent on scale and wholly dependent on grain size and gradation and sill geometry. The tractive forces of single grains and liquefaction are the mechanisms scour.