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Additionally, innovative nature-based coastal protection techniques are increasingly adopted, aligning with the principles of eco-hydraulics. Consequently, it is essential to accurately assess wave transmission through arrays of cylindrical elements.
This paper investigates the attenuation of solitary waves propagating through an array of rigid cylindrical stems, both emergent and submerged, placed on a horizontal seabed. The study combines theoretical, numerical, and experimental approaches. The results of the theoretical model are compared with numerical simulations obtained using the meshless Lagrangian Smoothed Particle Hydrodynamics (SPH) method, as well as with experimental laboratory data. In the experimental setup, solitary waves were tested in the presence of a background current to replicate realistic marine conditions, as the absence of circulation currents is rare in the ocean.
The comparison confirmed the validity of the theoretical model, supporting its application for the intended purposes. Furthermore, the study provided an evaluation of the bulk drag coefficient of the rigid stem arrays, as a function of their density, stem diameter, and submergence ratio. A video showcases the experimental setup used.