Velocity distribution and sediment motion induced by ship's propeller in ship channels.
A numerical model using the momentum theory of the propellor and Shield's diagram was developed to study sediment movement induced by a ship's propellor in a restricted waterway. The velocity distribution downstream of the propellor was simulated by the Gaussian normal distribution function. The shear velocity and shear stress were obtained using Sternberg's formulas. Once the ship's speed, depth of the waterway, RPM and diameter of the propeller, and draft of the ship are given, the velocity distribution and the grain size of the initial motion could be obtained from this model. Case studies are presented to show the influence of significant factors on sediment movement at the channel bottom induced by a ship's propeller.