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    3D model for prediction of flow profiles around bridges
    (TAYLOR & FRANCIS LTD, 2010) Kocaman, Selahattin; Seckin, Galip; Erduran, Kutsi S.
    Computational fluid dynamics models have become well established as tools for simulating free surface flow over a wide range of structures. This study is an assessment and comparison of the performance of a commercially available three-dimensional numerical software, which solves the Reynolds-averaged Navier-Stokes equations, to predict the free surface profiles from up-to downstream of four different bridge types with and without piers in a compound channel. The model results were compared with the available experimental data. Comparisons indicate that the model provides a reasonably good description of free surface profiles under both gradually and rapidly varied flow conditions in the bridge vicinity, respectively.
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    3D NUMERICAL MODELLING OF FLOW AROUND SKEWED BRIDGE CROSSING
    (HONG KONG POLYTECHNIC UNIV, DEPT CIVIL & STRUCTURAL ENG, 2012) Erduran, Kutsi S.; Seckin, Galip; Kocaman, Selahattin; Atabay, Serter
    This study investigates the performance of commercially available three-Dimensional (3D) numerical software, FLOW-3D, on the prediction of the water surface profiles using a series of experimental data obtained in a two stage channel with skewed bridge crossing. The experiments were carried out for four different types of bridge models with two different skew angles of phi = 30 degrees and phi = 45 degrees. FLOW-3D, which solves the Reynolds-averaged Navier - Stokes equations, was applied to experimental data for the prediction of water surface profiles along the compound channel from upstream to downstream. The comparison of free surface profiles of 3D model showed good agreement with the experimental data. Notably, the measured and computed afflux values are found to be almost identical.