NUMERICAL CALCULATION OF TURBULENT FLOW WITH FREE SURFACE

The problem of free surface is one of main difficulties in the numerical calculation of turbulent flow. This pa-per presents the concept of "elastic-lid" for the first time, which is used to calculate the steady turbulent flow do-mains with complex free surfaces. This method can be combined with the existing steady turbulence models. Com-pared with MAC and other unsteady methods, it is simpler and can give us the parameters related to turbulentflow. The method is supported by the techniques of "block-off" and "elastic-grid". which can be selected for dif-ferent problems. Finally, three examples are given to show the application of the "elastic-lid" method. The calcu-lated results are in good agreement with the measured.