| THREE-DIMENSIONAL SIMULATION OF MEANDERING RIVER BASED ON 3-D RNG κ-ε TURBULENCE MODEL |
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| 作者姓名： | ZHANG Ming-liang ;SHEN Yong-ming |
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| 作者单位： | [1]State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024,China; [2]Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China |
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| 基金项目： | Project supported by the National Basic Research Program of China （973 Program, Grant No. 2006CB403302）, the National Natural Science Foundation of China （Grant No. 50779006） and the Natural Science Foundation of Liaoning Province （Grant No. 20062170）. |
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| 摘 要： | A 3-D numerical model for calculating flow in non-curvilinear coordinates was established in this article. The flow was simulated by solving the full Reynolds-averaged Navier-Stokes equations with the RNG κ-ε turbulence model. In the horizontal x-y-plane, a boundary-fitted curvilinear co-ordinate system was adopted, while in the vertical direction, a σ co-ordinate transformation was used to represent the free surface and bed topography. The water level was determined by solving the 2-D Poisson equation derived from 2-D depth averaged momentum equations. The finite-volume method was used to discretize the equations and the SIMPLEC algorithm was applied to acquire the coupling of velocity and pressure. This model was applied to simulate the meandering channels and natural rivers, and the water levels and the velocities for all sections were given. By contrasting and analyzing, the agreement with measurements is generally good. The feasibility studies of simulating flow of the natural fiver have been conducted to demonstrate its applicability to hydraulic engineering research.
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| 关 键 词： | 坐标 湍流 模型设计 方程式 |
| 收稿时间： | 6 August 2007 |
THREE-DIMENSIONAL SIMULATION OF MEANDERING RIVER BASED ON 3-D RNG κ-ε TURBULENCE MODEL |
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| ZHANG Ming-liang,;SHEN Yong-ming.THREE-DIMENSIONAL SIMULATION OF MEANDERING RIVER BASED ON 3-D RNG κ-ε TURBULENCE MODEL[J].Journal of Hydrodynamics,2008,20(4):448-455. |
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| Authors: | ZHANG Ming-liang SHEN Yong-ming |
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| Affiliation: | [1]State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024,China [2]Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China |
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| Abstract: | A 3-D numerical model for calculating flow in non-curvilinear coordinates was established in this article. The flow was simulated by solving the full Reynolds-averaged Navier-Stokes equations with the RNG κ–? turbulence model. In the horizontal x–y-plane, a boundary-fitted curvilinear co-ordinate system was adopted, while in the vertical direction, a σco-ordinate transformation was used to represent the free surface and bed topography. The water level was determined by solving the 2-D Poisson equation derived from 2-D depth averaged momentum equations. The finite-volume method was used to discretize the equations and the SIMPLEC algorithm was applied to acquire the coupling of velocity and pressure. This model was applied to simulate the meandering channels and natural rivers, and the water levels and the velocities for all sections were given. By contrasting and analyzing, the agreement with measurements is generally good. The feasibility studies of simulating flow of the natural river have been conducted to demonstrate its applicability to hydraulic engineering research. |
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| Keywords: | non-orthogonal curvilinear coordinates RNG κ-ε turbulence model 2-D Poisson equation SIMPLEC algorithm depth averaged equation |
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