A numerical model for the simulation of wave dynamics in the surf zone and near coastal structures

• Main Author: Vu, Thanh Ca
• Format: Article
• Language: English
• Published: VNU 2014
• Subjects: Wave dynamics; Wave runup; Wave energy; Surf zone; Boussinessq model
• Online Access: http://repository.vnu.edu.vn/handle/11126/4550
• Institution: Vietnam National University, Hanoi

This paper describes a numerical model for the simulation of near shore wave dynamics and bottom topography change. In this part, the nearshore wave dynamics is simulated by solving the depth integrated oussinesq approximation equations for nearshore wave transformation together with continuity equation with a Crankicholson scheme. The wave runup on beaches is simulated by a scheme, similar to the Volume Of Fluid (VOF) technique. The wave energy loss due to wave breaking and shear generated turbulence is simulated by a ε − k model, in which the urbulence kinetic energy (TKE) generation is assumed as the sum of those respectively due to wave breaking and horizontal and vertical shear. The verification of the numerical model against data obtained from various indoor experiments reveals that the model is capable of simulating the wave dynamics, turbulence and bottom topography change under wave actions. The simulation of turbulence in the surf zone and near coastal structures enable the model realistically simulates the contribution of suspended sediment transport into the bed topography change.