TURBULENT FREE SURFACE FLOW SIMULATION USING A MULTILAYER MODEL

Based on the steady hydrodynamic equations, a multilayer (ML) model has been formulated for simulating turbulent flow in open channels. The model is imposed on a general curvilinear co-ordinate system with non-staggered finite volume discretisation. The turbulent quantities in the model are described by the layer-averaged k-epsilon turbulence model with standard coefficients. Assuming a vertical hydrostatic pressure distribution, a depth correction scheme, originating in the Rhie and Chow approach for confined flows, is incorporated into the SIMPLE procedure to computer the water surface. Using the multilayer model, flows in a 180 degree channel bend, near a groin, and in straight open channels are computed. The results are compared with experimental data and with calculations of a depth-averaged model (DAV) having three-dimensional effect corrections. The comparisons show that the predictions of the ML model on mean flow values are in good agreement with the available data and are better than those of the DAV model. The vertical distribution of the turbulent energy dissipation rate is also shown to agree well with the open-channel measurements.

  • Supplemental Notes:
    • Intl J Numerical Method Fluids, v 16 n 11, 15 June 1993, p 1007 [19 p, 28 ref, 9 fig]
  • Authors:
    • Lai, C J
    • Yen, C W
  • Publication Date: 1993

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00716196
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Feb 28 1996 12:00AM