A semi-implicit Lagrangian scheme for 3D shallow water flow with a two-layer turbulence model

P. K. Stansby, P. M. Lloyd

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The Lagrangian finite difference scheme has been developed to include an eddy viscosity model for turbulent mixing in the vertical direction. The σ-co-ordinate system for the vertical direction has been introduced to give accurate definition of bed and surface boundary conditions. The method is applied to current flow around a circular island with gently sloping sides which produce periodic recirculation zones (vortex shedding). Comparisons are made with experimental measurements of velocity using laser Doppler anemometry (time histories at specific points) and surface particle-tracking velocimetry. -from Authors
    Original languageEnglish
    Pages (from-to)115-133
    Number of pages18
    JournalInternational Journal for Numerical Methods in Fluids
    Volume20
    Issue number2
    Publication statusPublished - 1995

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