COMPUTATIONAL MECHANICS OF VERTICAL SORTING OF SEDIMENT IN SHEETFLOW REGIME BY 3D GRANULAR MATERIAL MODEL

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著者

    • HARADA EIJI
    • Department of Civil Engineering, Toyota National College of Technology
    • GOTOH HITOSHI
    • Department of Urban and Environmental Engineering, Kyoto University

抄録

In a beach morphological process, such as a formation of a sand bar and a beach cusp, sediment sorting plays an important role. To describe a mechanism of sediment sorting directly, the movable bed simulator, which is a granular material model based on the distinct element method is used. In this paper, a hydraulic experiment using an oscillatory water tunnel is conducted to track motion of sediment particles under vertical sorting in sheetflow regime. The three-dimensional movable bed simulator is driven to track detailed motion of individual sediment particles numerically. Performance of the movable bed simulator as a tool of computational dynamics is shown by comparing simulated physical properties, such as series of instantaneous images, velocity profile and number-density distribution of sediment particles, with the result of the experiment.

収録刊行物

  • Coastal engineering journal  

    Coastal engineering journal 50(1), 19-45, 2008-03-01 

    World Scientific Publishing Company

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