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MAO Jing-qiao. Numerical simulation study of flow field around the sandpit with complicate shape in riverbed[J]. Advances in Water Science, 2004, 15(1): 6-11.
Citation: MAO Jing-qiao. Numerical simulation study of flow field around the sandpit with complicate shape in riverbed[J]. Advances in Water Science, 2004, 15(1): 6-11.

Numerical simulation study of flow field around the sandpit with complicate shape in riverbed

Funds:  The project is supported by National Natural Science Foundation of China(No.59979005).
  • Received Date: 2002-11-18
  • Rev Recd Date: 2003-02-11
  • Publish Date: 2004-01-25
  • The key to study turbulence problems in reality by using numerical simulation is to take into account discrepancy of the Reynolds Stress.A 3-D anisotropic algebraic stress model (ASM) is established successfully to simulate turbulence driven secondary flow in natural channel.Comparison between the calculated results and experienced results in rectangular ducts has certified the high accuracy of the numerical model.Combining the ASM with unstructured meshes results in more reasonable out come than ever before for open channels with complicate sandpit The ASM is a powerful tool to study stability and deformation of riverbeds.The analyzes show that not only the streamwise flow scours the upstream edge of the sandpit but also the sec ondary current erodes transversal part of the cross section.However,studies in its turbulence characteristic indicate that a sandpit has severe effect on riverbed stability.
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    [4] Launder B E,Ying W M.Prediction of flow and heat transfer in ducts of square cross-section[J].Proceedings Institution of Mechanical Engineers,1973,187:455-461.
    [5] Naot D,Rodi W.Calculation of secondary currents in channel flow[J].Journal of the Hydraulics Division,ASCE,1982,108:948-968.
    [6] Iominaga A,Nezu I.Turbulent structure in compound open-channel flow[J].hyar Enging,ASCE,1991,117(1):21.
    [7] Nezu I,Rodi W.Experimental study on secondary currents in open channel flow[J].Proc of 21st IAHR Congress,Melbourne,1985,2:115-119.
    [8] 毛野.初论采沙对河床的影响及控制[J].河海大学学报,2000,28:92-96.
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Numerical simulation study of flow field around the sandpit with complicate shape in riverbed

Funds:  The project is supported by National Natural Science Foundation of China(No.59979005).

Abstract: The key to study turbulence problems in reality by using numerical simulation is to take into account discrepancy of the Reynolds Stress.A 3-D anisotropic algebraic stress model (ASM) is established successfully to simulate turbulence driven secondary flow in natural channel.Comparison between the calculated results and experienced results in rectangular ducts has certified the high accuracy of the numerical model.Combining the ASM with unstructured meshes results in more reasonable out come than ever before for open channels with complicate sandpit The ASM is a powerful tool to study stability and deformation of riverbeds.The analyzes show that not only the streamwise flow scours the upstream edge of the sandpit but also the sec ondary current erodes transversal part of the cross section.However,studies in its turbulence characteristic indicate that a sandpit has severe effect on riverbed stability.

MAO Jing-qiao. Numerical simulation study of flow field around the sandpit with complicate shape in riverbed[J]. Advances in Water Science, 2004, 15(1): 6-11.
Citation: MAO Jing-qiao. Numerical simulation study of flow field around the sandpit with complicate shape in riverbed[J]. Advances in Water Science, 2004, 15(1): 6-11.
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