TURBULENCE MODEL FOR WATER FLOW OVER TWO-DIMENSIONAL BED FORMS

The authors apply a boundary-fitted numerical model, which adopts the general conservation of mass and momentum equation, to free surface water flow over a two-dimensional topography. A three-layer near-wall turbulent kinetic energy/turbulence energy dissipation (k-E) model is employed to account partially for the effect of the separated-reattaching region in front of each sand wave. A streamline curvature modification is introduced to achieve a proper response to the degree of anisotropy between the normal stresses. The geometric shape of the train of sand waves is represented by a general curvilinear coordinate system. The numerical results were compared with the available experimental data in the literature, and overall agreement was good. Detailed computations suggest that the two-equation k-E model with careful modifications can yield good predictions for the sand-wave problem. The present model provides a foundation for the further study of bed-load transport and resistance to flow arising from the movement of sediment bed forms.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8672558
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Cheong, H F
  • XUE, H
• Publication Date: 1997-5

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 402-409
• Serial:
  • Journal of Hydraulic Engineering
  • Volume: 123
  • Issue Number: 5
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9429
  • Serial URL: https://ascelibrary.org/journal/jhend8

Subject/Index Terms

• TRT Terms: Dissipation; Flow; Geometric configurations and shapes; Kinetic energy; Loads; Mathematical models; Scour; Sedimentation; Streamflow; Turbulence; Water
• Candidate Terms: Turbulent flow
• Uncontrolled Terms: Models; Modifications; Sand waves; Sediment transport
• Old TRIS Terms: Bed load; Geometric shapes
• Subject Areas: Energy; Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00736729
• Record Type: Publication
• Files: TRIS
• Created Date: May 26 1997 12:00AM