Volume 12 Issue 2
Jun.  2019
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Article Navigation >  Water Science and Engineering  > 2019  >  12(2): 108-114
Xiao-dong Liu, Ling-qi Li, Peng Wang, Zu-lin Hua, Li Gu, Yuan-yuan Zhou, Lu-ying Chen. 2019: Numerical simulation of wind-driven circulation and pollutant transport in Taihu Lake based on a quadtree grid. Water Science and Engineering, 12(2): 108-114. doi: 10.1016/j.wse.2019.05.001
Citation: Xiao-dong Liu, Ling-qi Li, Peng Wang, Zu-lin Hua, Li Gu, Yuan-yuan Zhou, Lu-ying Chen. 2019: Numerical simulation of wind-driven circulation and pollutant transport in Taihu Lake based on a quadtree grid. Water Science and Engineering, 12(2): 108-114. doi: 10.1016/j.wse.2019.05.001
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Numerical simulation of wind-driven circulation and pollutant transport in Taihu Lake based on a quadtree grid

doi: 10.1016/j.wse.2019.05.001

  • a Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, Nanjing 210098, China

  • b College of Environment, Hohai University, Nanjing 210098, China

Funds:  This work was supported by the National Nature Science Foundation of China (Grants No. 51739002 and 51479064), the World-Class Universities (Disciplines) and Characteristic Development Guidance Funds for the Central Universities, and the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions (Grant No. PPZY2015A051).
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  • Corresponding author: Zu-lin Hua
  • Received Date: 2019-01-23
  • Rev Recd Date: 2019-04-11
    Abstract
  • In this study, a two-dimensional flow-pollutant coupled model was developed based on a quadtree grid. This model was established to allow the accurate simulation of wind-driven flow in a large-scale shallow lake with irregular natural boundaries when focusing on important small-scale localized flow features. The quadtree grid was created by domain decomposition. The governing equations were solved using the finite volume method, and the normal fluxes of mass, momentum, and pollutants across the interface between cells were computed by means of a Godunov-type Osher scheme. The model was employed to simulate wind-driven flow in a circular basin with non-uniform depth. The computed values were in agreement with analytical data. The results indicate that the quadtree grid has fine local resolution and high efficiency, and is convenient for local refinement. It is clear that the quadtree grid model is effective when applied to complex flow domains. Finally, the model was used to calculate the flow field and concentration field of Taihu Lake, demonstrating its ability to predict the flow and concentration fields in an actual water area with complex geometry.

     

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