Author(s): X. Jin; N. Booij; C. K. Ranenburg
Linked Author(s):
Keywords: No Keywords
Abstract: By using the shallow water assumption, a quasi-three-dimensional numerical model composed of two coupled modules was developed. In one of these modules, the depth-averaged flow is computed, in the other the vertical distribution of the flow velocities is determined. The vertical eddy viscosity v was found to have marked effects on the vertical distribution of the velocity. Based on experimental measurements of velocity profiles in a wind- water flume, a new formulation of v was found as a function of the free surface shear stress, the bottom shear stress and the vertical coordinate. The bottom boundary condition is modelled by using boundary layer theory. In computations for some simplified flow configurations, the advective terms in the equations of motion are shown to be important to model the 3D features of flows.
Year: 1991