Two-dimensional, multi-grid, viscous, free-surface flow calculation

摘要

A two-dimensional subcritical and/or supercritical, viscous, free-surface flow calculation method is employed. A very important feature of the method is its simplicity and the physical understanding obtained from the solution procedure. The grid used may be irregular and conforms to the physical boundaries of the problem. A multi-grid algorithm has been developed to accelerate the convergence solution. The viscous flow stresses are described using either fixed value eddy viscosity coefficient or values related to the flow properties. Applications regarding subcritical viscous flow near spur-dike and flow in a supercritical channel are reported. Calculated results are in good agreement with measurements and/or other numerical solution results. Convergence histories are presented and the results indicate that substantial computational savings for the solution accuracy can be achieved.