Numerical Simulation of Coarse Sandy Bed Scour by 2D Vertical Submerged Jet

The Sediment Scour Model was used to numerical simulate non-cohesive sandy bed scour by 2D submerged jet. The scour lasted 10 seconds. The RNG k-e turbulence mode used,is more useful for the flow with low intensity of turbulence and strong shear region. The numerical results and experimental results agree with quite well. They indicatete bigger. The bigger the jet velocity is,the deeper the scour depth is if the scour time is the same. When the jet velocity is constant,a logarithmic relationship exists between the maximum scour depth and the scour time.