Experimental. Study on Slip Flow of Sediment Layer in Horizontal Pipe

Abstract

Flow resistance and sediment transport for slip flow of sediment layer in a horizontal pipe are discussed experimentally, and following conclusions are obtained;Shear stress of bed surface of a sliding sediment layer can be estimated by the method of hydraulic radius dividion of the clear water flow section into two, for pipe wall and sediment wall. Conditions for occurrence of slip flow of sediment are explained by the relationship between energy gradient and thickness of sediment layer. The condition of incipient motion of slip flow can be estimated by equations of stable force balance.