Volume 5 Issue 1
Mar.  2012
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Li-ren YU. 2012: Flow and transport simulation of Madeira River using three depth-averaged two-equation turbulence closure models. Water Science and Engineering, 5(1): 11-25. doi: 10.3882/j.issn.1674-2370.2012.01.002
Citation: Li-ren YU. 2012: Flow and transport simulation of Madeira River using three depth-averaged two-equation turbulence closure models. Water Science and Engineering, 5(1): 11-25. doi: 10.3882/j.issn.1674-2370.2012.01.002

Flow and transport simulation of Madeira River using three depth-averaged two-equation turbulence closure models

doi: 10.3882/j.issn.1674-2370.2012.01.002
Funds:  FAPESP (Foundation for Supporting Research in São Paulo State), Brazil, of the PIPE Project (Grant No. 2006/56475-3)
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  • Corresponding author: Li-ren YU
  • Received Date: 2011-07-27
  • Rev Recd Date: 2011-12-15
  •  This paper describes a numerical simulation in the Amazon water system, aiming to develop a quasi-three-dimensional numerical tool for refined modeling of turbulent flow and passive transport of mass in natural waters. Three depth-averaged two-equation turbulence closure models,  ,  , and  , were used to close the non-simplified quasi-three-dimensional hydrodynamic fundamental governing equations. The discretized equations were solved with the advanced multi-grid iterative method using non-orthogonal body-fitted coarse and fine grids with collocated variable arrangement. Except for steady flow computation, the processes of contaminant inpouring and plume development at the beginning of discharge, caused by a side-discharge of a tributary, have also been numerically investigated. The three depth-averaged two-equation closure models are all suitable for modeling strong mixing turbulence. The newly established turbulence models such as the   model, with a higher order of magnitude of the turbulence parameter, provide a possibility for improving computational precision.

     

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