Kumaran, V.Neelamani, S.Vijay, K.G.Al-Anjari, N.Al-Ragum, A.2026-02-042022Journal of Hydro-Environment Research, 2022, 41, , pp. 25-3715706443https://doi.org/10.1016/j.jher.2022.02.001https://idr.nitk.ac.in/handle/123456789/22630In the present study, scattering of surface gravity waves by multiple slotted vertical barriers arranged in a zig-zag manner is analyzed by employing Computational Fluid Dynamics (CFD) and validated with physical model tests. The porosity of the vertical slotted barrier is varied from 10% to 40%, and the number of slotted barriers varied from 1 to 6. The results from CFD correlate well with the laboratory measurements on the scattering coefficients for a wide range of input conditions giving a high level of confidence. For relatively short waves (h/λ > 0.3, h- water depth and λ- wave length), slotted barriers up to 3 numbers and porosity from 20% to 30% are required to achieve wave transmission coefficient in the range of 0.2 to 0.3. For relatively long waves (h/λ < 0.3), slotted barriers of 5 to 6 numbers and porosity in the range of 10% to 20% are needed to obtain wave transmission of 0.2 to 0.3. The results presented in this study can be used for a wide range of wave damping applications in the field of coastal engineering. © 2022 International Association for Hydro-environment Engineering and Research, Asia Pacific DivisionCoastal engineeringComputational fluid dynamicsGravity wavesWave propagationWave transmissionExperimental investigationsNumerical approachesPhysical approachesPhysical model testPorous barriersScattering co-efficientSurface gravity wavesThin porous barrier configurationWave attenuationZig-zagPorositycomputational fluid dynamicsexperimental studygravity wavenumerical modelporosityporous mediumwave attenuation