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dc.contributor.authorAhmad, Nadeem
dc.date.accessioned2019-04-25T07:21:35Z
dc.date.available2019-04-25T07:21:35Z
dc.date.created2019-04-11T18:41:04Z
dc.date.issued2019
dc.identifier.citationCoastal Engineering. 2019, 148 19-35.nb_NO
dc.identifier.issn0378-3839
dc.identifier.urihttp://hdl.handle.net/11250/2595353
dc.description.abstractUnderstanding the pipeline scour processes under the combined action of waves and current is essential for adequate scour protection measures. This paper presents the numerical modelling of pipeline scour under the co-directional combined action of waves and current including the prediction of the unsteady free surface. The numerical modelling is performed with the open-source CFD model REEF3D. The model solves the Reynolds-Averaged Navier-Stokes (RANS) equations together with the turbulence model and a sediment transport algorithm. In order to ensure the accuracy of the flow field, the model is thoroughly validated for the hydrodynamics of co-directional combined waves and current. Results for the velocity profiles show a good agreement with the experimental observations. The model is then applied to simulate the different case scenarios of the scour under waves alone, current alone, and combined waves and current. The numerical results for scour below the pipeline show good agreement with the experimental data which confirms the applicability of the model to study pipeline scour under the combined action of waves and current. A series of simulations are run for different values of the non-dimensional parameter for the combined waves and current varying between 0 and 1.0 for the given KC number. The results demonstrate the correlation between values of and (1) the flow field below the pipeline, (2) the scour depth, and (3) the temporal variation of the scouring process. The findings highlight the variation of the maximum scour depth below the pipeline with U cm.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleNumerical modelling of pipeline scour under the combined action of waves and current with free-surface capturingnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber19-35nb_NO
dc.source.volume148nb_NO
dc.source.journalCoastal Engineeringnb_NO
dc.identifier.doihttps://doi.org/10.1016/j.coastaleng.2019.02.008
dc.identifier.cristin1691798
dc.description.localcode© 2019. This is the authors’ accepted and refereed manuscript to the article. Locked until 19 February 2021 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/nb_NO
cristin.unitcode194,64,91,0
cristin.unitnameInstitutt for bygg- og miljøteknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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