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dc.contributor.authorGuo, Zhenen_US
dc.contributor.authorJeng, Dong Shengen_US
dc.contributor.authorZhao, Hongyien_US
dc.contributor.authorGuo, Weien_US
dc.contributor.authorWang, Lizhongen_US
dc.date.accessioned2019-06-19T13:05:22Z
dc.date.available2019-06-19T13:05:22Z
dc.date.issued2019en_US
dc.identifier.issn0378-3839en_US
dc.identifier.doi10.1016/j.coastaleng.2018.10.012en_US
dc.identifier.urihttp://hdl.handle.net/10072/383392
dc.description.abstractSediment incipient motion is the first step of the whole process of sediment transport. However, previous numerical works simplified the seabed surface as a type of impermeable and rigid boundary, and ignored the effect of seepage flow on the mobility of bed particles. In this paper, to reveal the physics behind sediment incipient motion around a free spanning pipeline, an integrated numerical model, coupling the SST (Shear-Stress Transport) turbulence model with the porous seabed model, was proposed. Numerical studies showed that with the periodic formation and shedding of vortices around the pipeline, both the oscillatory and residual excess pore-pressures developed within the seabed. In some cases, the vertical gradient of excess pore-pressure (seepage force) had a significant impact on the mobility of bed particles around the pipeline. It was found that lower saturation degree and seabed permeability would remarkably increase both the oscillatory and residual seepage forces, and thus enhance bed particle mobility. While for a sandy seabed with smaller soil shear modulus, the oscillatory seepage force was only slightly reduced, but a high residual seepage force would be generated with time. This could lead to obvious decrease in the submerged weight of bed particles, making them more easily dragged away from the seabed.en_US
dc.description.peerreviewedYesen_US
dc.languageEnglishen_US
dc.publisherELSEVIER SCIENCE BVen_US
dc.relation.ispartofpagefrom50en_US
dc.relation.ispartofpageto62en_US
dc.relation.ispartofjournalCOASTAL ENGINEERINGen_US
dc.relation.ispartofvolume143en_US
dc.subject.fieldofresearchCivil Engineeringen_US
dc.subject.fieldofresearchGeologyen_US
dc.subject.fieldofresearchcode0905en_US
dc.subject.fieldofresearchcode0403en_US
dc.titleEffect of seepage flow on sediment incipient motion around a free spanning pipelineen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Articlesen_US
dc.type.codeC - Journal Articlesen_US
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.description.versionPost-printen_US
gro.rights.copyright© 2019 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence, which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.en_US
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