dc.contributor.author | Fraga, Vinicius Serta | |
dc.contributor.author | Yin, Guang | |
dc.contributor.author | Ong, Muk Chen | |
dc.contributor.author | Myrhaug, Dag | |
dc.date.accessioned | 2023-03-15T13:09:57Z | |
dc.date.available | 2023-03-15T13:09:57Z | |
dc.date.created | 2022-04-08T14:42:18Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | Fraga, V. S., Yin, G., Ong, M. C., & Myrhaug, D. (2022). CFD investigation on scour beneath different configurations of piggyback pipelines under steady current flow. Coastal Engineering, 172, 104060. | en_US |
dc.identifier.issn | 0378-3839 | |
dc.identifier.uri | https://hdl.handle.net/11250/3058452 | |
dc.description.abstract | Scour beneath piggyback pipelines laid on a sandy seabed is numerically investigated by solving two-dimensional (2D) Unsteady Reynolds-averaged Navier-Stokes (URANS) equations. The fluid flow and the sediment transport are resolved using a two-phase flow Eulerian-Eulerian numerical solver SedFoam based on the open-source code OpenFOAM. A parametric study is performed for different Shields parameters defined as θ = U2 f /(s− 1)gd50 of 0.068, 0.18 and 0.33 where Uf denotes the shear friction velocity on the seabed, the specific density of the sediment grains is s = ρs /ρf where ρs and ρf are the density of the solid and fluid phases, respectively, g is the gravitational acceleration and d50 is the median grain diameter. Scour processes beneath piggyback pipelines under steady current flow condition are studied for different gap ratios of G/D = 0, 0.15, 0.25 and 0.35 between the main cylinder and the additional ones with a diameter ratio of d/D = 0.3 between them. Mesh convergence studies based on the scour depth and the sediment profile are performed to obtain an appropriate grid resolution. A validation study is performed by comparing the scour depth of the single cylinder cases with the published experimental results obtained by Mao (1986). The effects of different θ and geometry configurations on the scour depth and the sediment profile are obtained and discussed. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | CFD investigation on scour beneath different configurations of piggyback pipelines under steady current flow | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | The authors | en_US |
dc.subject.nsi | VDP::Teknologi: 500 | en_US |
dc.source.volume | 172 | en_US |
dc.source.journal | Coastal Engineering | en_US |
dc.identifier.doi | 10.1016/j.coastaleng.2021.104060 | |
dc.identifier.cristin | 2016240 | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |