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

• HARADA, EIJI

• GOTOH, HITOSHI

Abstract

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.

Journal

• Coastal Engineering Journal

  Coastal Engineering Journal 50 (1), 19-45, 2008

  World Scientific Publishing Company

Keywords

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

Details

• CRID: 1050001201692857088
• NII Article ID: 10021137021
• NII Book ID: AA1152886X
• ISSN: 05785634
• HANDLE: 2433/93448
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles