Numerical investigation of wave-induced local scour around a submarine pipeline

Lin Lu, Ming-Ming Liu, Bin Teng, Guo-Qiang Tang, Ming Zhao

    Research output: Chapter in Book / Conference PaperConference Paperpeer-review

    Abstract

    ![CDATA[A two-dimensional numerical model is developed in this work to predict the local scour around subsea pipelines induced by the orbital fluid motion due to free-surface water waves. Instead of being simplified as an oscillatory flow, the motion of the wave surface is predicted numerically. The numerical model is based on the two-dimensional Reynolds-Averaged Navier-Stokes equations with the Shear-Stress Transport (SST) k-ω turbulence closure. The Petrove Galerkin Finite Element Method (PG-FEM) is used to discretize the governing equations. In order to account for the free surface of water waves and the seabed evolution due to local scour, an Arbitrary Lagrangian-Eulerian (ALE) method is employed. Both suspended and bed load sediment transportation rates are considered to predict the evolution of seabed profile. The numerical model is validated against available numerical results and experimental data of wave propagation over submerged structures and local scour around submarine pipeline in steady current. Then, the numerical simulations are carried out for local scour around a submerged pipeline in water waves. Comparisons with laboratory measurements show that the present numerical model works well in predicting the equilibrium profile of local scour, which sheds lights on the numerical simulations of local scour under waves in shallow water, where the waves are expected to be strongly non-linear.]]
    Original languageEnglish
    Title of host publicationScour and Erosion: Proceedings of the 7th International Conference on Scour and Erosion, The University of Western Australia, Perth, Australia, 2-4 December 2014
    PublisherCRC Press
    Pages733-740
    Number of pages8
    ISBN (Print)9781138027329
    Publication statusPublished - 2014
    EventInternational Conference on Scour and Erosion -
    Duration: 2 Dec 2014 → …

    Conference

    ConferenceInternational Conference on Scour and Erosion
    Period2/12/14 → …

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