THREE-DIMENSIONAL MATHEMATICAL MODEL OF SUSPENDED-SEDIMENT TRANSPORT

With advances in computer technology, the use of river sediment numerical models in large hydraulic projects has become increasingly important and popular. This paper presents the basic equations for a mathematical model of sediment-laden flow in a nonorthogonal curvilinear coordinate system. The equations were derived using a tensor analysis of two-phase flow and incorporate a natural variable-density turbulence model with nonequilibrium sediment transport. Correspondingly, a free-surface and the bottom sediment concentration are employed to provide the boundary conditions at the river surface and the riverbed. The finite analytic method is used to solve the equations of mass and momentum conservation and also the transport equation for suspended sediment. To demonstrate the method, the sediment deposition for the Three Gorges Project in China is considered. The mathematical model specifies the boundary conditions for the inlet and outlet using data from physical model experiments. The results for the mathematical model were tested against laboratory measurements from the physical model experiment. Good agreement and accuracy were obtained.

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  • Supplemental Notes:
    • This research was partly supported by the National Natural Science Foundation of China, Grant No. 59890200, Beijing.
  • Corporate Authors:

    American Society of Civil Engineers

    1801 Alexander Bell Drive
    Reston, VA  United States  20191-4400
  • Authors:
    • Fang, H-W
    • Wang, G-Q
  • Publication Date: 2000-8

Language

  • English

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Filing Info

  • Accession Number: 00797204
  • Record Type: Publication
  • Contract Numbers: 59890200, BD-2775/93, 604/11/13093
  • Files: TRIS
  • Created Date: Aug 7 2000 12:00AM