Abstract
The cylinders extending from the plat bottom and piercing the water free surface are frequently used to mimic a patch of emergent vegetation. In the present work, the wave process through an emergent circular array of slender cylinders is investigated using a three dimensional non-hydrostatic numerical model. The paper focuses on the investigation of the wave energy accumulation or attenuation within the cylinder patch and in the near wake field. The incident waves are 2nd order Stokes water waves with two different wave length, i.e. two different KC numbers for a single cylinder. A constant patch diameter (DG) and different solid volume fractions (SVF) Φ are considered in the series of study cases. The wave trapping by structures is observed when the non-linear wave passing the cylinder patch. The analysis of the wave trapping shows a distinct correlativity between the incident wave condition and the patch geometry. By means of numerical simulations with high grid resolution, it is able to have an insight into the dynamic process of the wave near-trapping phenomenon.
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