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

• 後藤, 仁志

• GOTOH, HITOSHI

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

  World Scientific Publishing Company

キーワード

• Graded sediment
• sheetflow regime
• vertical sorting
• 3D movable bed simulator
• granular material model
• distinct element method

詳細情報

• CRID: 1050001201692857088
• NII論文ID: 10021137021
• NII書誌ID: AA1152886X
• ISSN: 05785634
• HANDLE: 2433/93448
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles