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dc.contributor.authorTong, L.
dc.contributor.authorZhang, J.
dc.contributor.authorZhao, L.
dc.contributor.authorZheng, J.
dc.contributor.authorGuo, Yakun
dc.date.accessioned2020-08-14T06:01:09Z
dc.date.available2020-08-14T06:01:09Z
dc.date.issued2020-10
dc.identifier.citationTong L, Zhang J, Zhao J et al (2020) Modelling study of wave damping over a sandy and a silty bed. Coastal Engineering. 161: 103756.en_US
dc.identifier.urihttp://hdl.handle.net/10454/17957
dc.descriptionYesen_US
dc.description.abstractLaboratory experiments have been carried out to investigate wave damping over the seabed, in which the excess pore pressure and free surface elevations are synchronously measured for examining the wave-induced soil dynamics and wave kinematics. Two types of soil, namely fine sand and silt, are tested to examine the role of soil in the wave damping. Observation of experiments shows that (i) soil liquefaction takes place for some tests with silty bed and soil particles suspend into the water layer when the bed is made of silt; (ii) sand ripples can be generated for experiments with sand bed. Measurements reveal that the wave damping greatly depends on the soil dynamic responses to wave loading and the wave damping mechanism over the silty seabed differs from that over the sand bed. On the one hand, the wave damping rate is greatly increased, when soil liquefaction occurs in the silty bed. On the other hand, the presence of sand ripples generated by oscillatory flow in the sand bed experiments also increases the wave damping to some extent. Furthermore, experimental results show that soil particle suspension in the silt bed test contributes to the wave damping. Theoretical analysis is presented to enhance discussions on the wave damping. The theoretical calculations demonstrate that the wave damping is mainly induced by the shear stress in the boundary layer for the cases when no liquefaction occurs. While for the cases when soil liquefaction takes place, the viscous flow in the liquefied layer contributes most towards to the wave damping.en_US
dc.description.sponsorshipthe National Science Fund for Distinguished Young Scholars (Grant No. 51425901), the National Key Research and Development Program of China (2017YFC1404200), the Marine Renewable Energy Research Project of State Oceanic Administration (GHME2015GC01), and the 111 Project (Grant No. B12032)en_US
dc.language.isoenen_US
dc.rights© 2020 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)en_US
dc.subjectWave damping rateen_US
dc.subjectBottom boundary layeren_US
dc.subjectViscous flowen_US
dc.subjectLiquefactionen_US
dc.subjectSand rippleen_US
dc.titleModelling study of wave damping over a sandy and a silty beden_US
dc.status.refereedYesen_US
dc.date.Accepted2020-07-13
dc.date.application2020-07-23
dc.typeArticleen_US
dc.type.versionAccepted manuscripten_US
dc.identifier.doihttps://doi.org/10.1016/j.coastaleng.2020.103756
refterms.dateFOA2020-08-14T06:01:42Z


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