QUASI-3D MODELLING OF SURF ZONE DYNAMICS

Proceedings of the International Conference on Coastal Engineering

Johan Henrotte²  Dirk Jan Walstra¹  Arjen Luijendijk³  Maarten van Ormondt³ 

[1] Deltares / Delft University of Technology;DHV;Deltares

关键词: quasi-3d modelling;    surf zone;    coastal modelling;    nearshore morphodynamics;   

DOI  :  10.9753/icce.v32.currents.52

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

A quasi-three-dimensional model (quasi-3D) has been developed through the implementation of an analytical 1DV flow model in existing depth-averaged shallow water equations. The model includes the effects of waves and wind on the vertical distribution of the horizontal velocities. Comparisons with data from both physical and field cases show that the quasi-3D approach is able to combine the effect of vertical structures with the efficiency of depth-averaged simulations.Inter-comparisons with three-dimensional simulations show that the quasi-3D approach can represent similar velocity profiles in the surf zone. Quasi-3D morphodynamic simulations show that the bed dynamics in the surf zone represent therelevant 3D effects in the surf zone much more than the depth-averaged computations. It was shown that the quasi-3D approach is computationally efficient as it only adds about 15-20% to the runtimes of a 2DH simulation which is minor compared to a run time increase of 250-800% when switching to a 3D simulation.

【 授权许可】

Unknown