MODELING TURBULENT BORE PROPAGATION IN THE SURF ZONE

Proceedings of the International Conference on Coastal Engineering

Ib A. Svendsen¹  David R. Basco² 

[1] Institute of Hydrodynamics and Hydraulic Engineering (ISVA), Technical University of Denmark;Civil and Ocean Engineering, Texas ASM University

关键词: bore;    bore modeling;    surf zone;    bore propagation;   

DOI  :  10.9753/icce.v19.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

Initial efforts to numerically simulate surf zone waves by using a modified form of the nonlinear shallow water equations are described. Turbulence generated at the front of the moving bore-like wave spreads vertically downward to significantly alter the velocity profile and hence the horizontal momentum flux. This influence of turbulence is incorporated into the momentum balance equation through a momentum correction coefficient, a which is prescribed based in part upon the theoretical a(x) distribution beneath stationary hydraulic jumps. The numerical results show that with a suitably chosen a(x) distribution, the equations not only dissipate energy as the waves propagate, but also that the wave shape stabilizes as a realistic profile rather than progressively steepening as when the nonlinear shallow water equations are employed. Further research is needed to theoretically determine the appropriate a(x,t) distribution.

【 授权许可】

Unknown