COMPUTATION OF WAVE BREAKING ON SLOPING BEACH BY VOF METHOD

In this paper, the solitary wave deformation and breaking process along a sloping beach is investigated by suing the improved volume of fluid method. As the initial conditions of the incident wave, Laitone's second order formulas for the free surface profile, velocity and pressure fields of a solitary wave are employed. Comparisons with the laboratory experimental data of the wave height on the slope are presented. Numerical computations have been carried out for several configurations of beach slopes with m=1:2, 1:4, 1:8 and 1:20. Kinematics of the wave during propagation on a sloping beach is investigated. For a steep slope, the internal velocity field on the sloping beach is demonstrated in detail during run-up and run-down of the non-breaking wave. For a gentle slope, the phenomena of wave breaking such as wave steepening, overturning and bore formation have been successfully simulated by an improved VOF method.