Submerged Horizontal Jet over Erodible Bed

The results of an experimental investigation of the flow characteristics of a submerged horizontal jet flowing over a partly rigid and erodible bed are presented. The diffusion characteristics of the jet, growth of boundary layer thickness, velocity distribution within the boundary layer, critical shear stress at equilibrium stage, and the time variation of shear stress at the location of maximum scour have been investigated. The expression of critical shear stress has been obtained from the solution of Von Karman's integral equation. A functional relationship of time variation of shear stress has been found out by correlating the dynamic pressure drop recorded by a Preston tube with the velocity distribution law developed from experimental data.