A 3D HYDRODYNAMIC MODEL WITH THE DEPTH-DEPENDENT RADIATION STRESSES

摘要

In order to simulate the wave induced nearshore current accurately, it is of great importance to develop the 3D hydrodynamic model taking into account the depth-dependent radiation stresses. Expressions for depth-dependent radiation stresses in the Cartesian coordinates are introduced on the basis of linear wave theory. Then the depth-dependent radiation stresses are added to the 3D hydrodynamic model of ELCIRC. The wave set-up, set-down and undertow are simulated by the modified ELCIRC model based on the wave field provided by the experiment or the REF/DIF wave model of parabolic mild-slope equation.The model results show good agreement with the experimental data for wave set-up and set-down. The undertow profiles predicted by the model are also consistent with the experimental results.