%0 Journal Article %1 Torres-Freyermuth201728 %A Torres-Freyermuth, A. %A Brocchini, M. %A Corvaro, S. %A Pintado-Patiño, J.C. %D 2017 %I Elsevier Ltd %J Ocean Modelling %K 2017 LowFrequencyWaveAttenuation NearbedFlow PorousMedia VARANS WaveAttenuation from:erick007 %P 28-40 %R 10.1016/j.ocemod.2017.07.004 %T Wave attenuation over porous seabeds: A numerical study %U https://www.scopus.com/inward/record.uri?eid=2-s2.0-85025824966&doi=10.1016%2fj.ocemod.2017.07.004&partnerID=40&md5=eddc74d72b85f200d558feeed46c431e %V 117 %X We investigate wave attenuation over porous seabeds by means of a phase- and depth- resolving numerical model that solves the Volume-Averaged Reynolds-Averaged Navier–Stokes (VARANS) equations. The numerical model is calibrated with laboratory data from Corvaro et al. (2010). The numerical model predicts the wave attenuation and the velocity field near the porous bed for different regular wave conditions. Subsequently, a parametric analysis on the physical characteristics of the porous media is made to investigate their relative role on wave attenuation. The results of the analysis indicate nonlinear dependencies of wave attenuation on both, total porosity and mean grain diameter. The widely used parabolic model in terms of the dispersiveness parameter predicts both types of dependencies, effectively. Hence, new parametric formulations are derived for the determination of the coefficients involved in the parabolic model for each type of dependence. On the other hand, the role of the spectral shape on the wave spectrum bulk dissipation is investigated. Numerical results for irregular waves show a clear dependence of the dissipation rate with the Ursell (Ur) parameter. The dissipation rate becomes sensitive to frequency spreading for Ur < 20. Moreover, forcing the model assuming an f− 5 tail in the incident wave spectrum underpredicts seabed attenuation with respect to an f− 4 formulation. Finally, bispectral analysis of irregular wave propagation allow us to investigate the mechanism of wave attenuation. The numerical results suggest that energy is directly dissipated at the peak frequency, whereas nonlinear energy transfer plays an important role in energy attenuation at higher harmonics. © 2017 Elsevier Ltd

@article{Torres-Freyermuth201728, abbrev_source_title = {Ocean Model.}, abstract = {We investigate wave attenuation over porous seabeds by means of a phase- and depth- resolving numerical model that solves the Volume-Averaged Reynolds-Averaged Navier–Stokes (VARANS) equations. The numerical model is calibrated with laboratory data from Corvaro et al. (2010). The numerical model predicts the wave attenuation and the velocity field near the porous bed for different regular wave conditions. Subsequently, a parametric analysis on the physical characteristics of the porous media is made to investigate their relative role on wave attenuation. The results of the analysis indicate nonlinear dependencies of wave attenuation on both, total porosity and mean grain diameter. The widely used parabolic model in terms of the dispersiveness parameter predicts both types of dependencies, effectively. Hence, new parametric formulations are derived for the determination of the coefficients involved in the parabolic model for each type of dependence. On the other hand, the role of the spectral shape on the wave spectrum bulk dissipation is investigated. Numerical results for irregular waves show a clear dependence of the dissipation rate with the Ursell (Ur) parameter. The dissipation rate becomes sensitive to frequency spreading for Ur < 20. Moreover, forcing the model assuming an f− 5 tail in the incident wave spectrum underpredicts seabed attenuation with respect to an f− 4 formulation. Finally, bispectral analysis of irregular wave propagation allow us to investigate the mechanism of wave attenuation. The numerical results suggest that energy is directly dissipated at the peak frequency, whereas nonlinear energy transfer plays an important role in energy attenuation at higher harmonics. © 2017 Elsevier Ltd}, added-at = {2021-06-02T00:52:48.000+0200}, affiliation = {Laboratorio de Ingeniería y Procesos Costeros, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Sisal, Yucatán 97835, Mexico; Laboratorio Nacional de Resiliencia Costera, Laboratorios Nacionales CONACYT, Mexico; Università Politecnica delle Marche, Via Brecce Bianche, Ancona 60131, Italy}, author = {Torres-Freyermuth, A. and Brocchini, M. and Corvaro, S. and Pintado-Patiño, J.C.}, author_keywords = {Low-frequency wave attenuation; Nearbed flow; Porous media; VARANS; Wave attenuation}, biburl = {https://www.bibsonomy.org/bibtex/2d37ad681dc9460b22d23b6dea31dca44/publ_del_lipc}, correspondence_address1 = {Torres-Freyermuth, A.; Laboratorio de Ingeniería y Procesos Costeros, Mexico; email: ATorresF@iingen.unam.mx}, document_type = {Article}, doi = {10.1016/j.ocemod.2017.07.004}, funding_details = {490080}, funding_text 1 = {The authors acknowledge the financial support by Italian RITMARE Flagship Project (SP3-WP4), a National Research Programme funded by the Italian Ministry of University and Research. Financial support from the EU, through the ENVICOP Project (PIRSES-2011-295162) and from the US-ONR, through the NICOP Research Grant (N62909-13-1-N020) is, also, gratefully acknowledged. J.C. Pintado-Pati?o acknowledges the financial support provided by the Mexican National Council of Science and Technology (CoNACyT) under the graduate scholarship 490080. ATF and JCP thank the Laboratorio Nacional de Resiliencia Costera (CONACYT Project LN27154) for additional financial support. ATF acknowledge Tim Janssen and Anouk T. de Baker for discussion on bispectral analysis. Gonzalo Mart?n Ruiz is acknowledged for technical support.}, interhash = {894ce3ffab76d42b9ce2885024cfdaf7}, intrahash = {d37ad681dc9460b22d23b6dea31dca44}, issn = {14635003}, journal = {Ocean Modelling}, keywords = {2017 LowFrequencyWaveAttenuation NearbedFlow PorousMedia VARANS WaveAttenuation from:erick007}, language = {English}, pages = {28-40}, publisher = {Elsevier Ltd}, source = {Scopus}, timestamp = {2021-06-23T06:22:16.000+0200}, title = {Wave attenuation over porous seabeds: A numerical study}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85025824966&doi=10.1016%2fj.ocemod.2017.07.004&partnerID=40&md5=eddc74d72b85f200d558feeed46c431e}, volume = 117, year = 2017 }