| 斜坡上异重流的三维数值模拟 |
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| 引用本文： | 赖锡军,汪德爟,姜加虎,黄群.斜坡上异重流的三维数值模拟[J].水科学进展,2006,17(3):342-347. |
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| 作者姓名： | 赖锡军 汪德爟 姜加虎 黄群 |
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| 作者单位： | 1.中国科学院南京地理与湖泊研究所, 江苏, 南京, 210008; |
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| 基金项目： | 中国科学院知识创新工程项目;中国科学院知识创新工程项目 |
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| 摘 要： | 针对异重流的流动特征,建立了适用于具有各向异性浮力紊动特征的三维异重流运动的数学模型,并模拟了异重流在15°斜坡底面上的潜行过程。计算结果准确地模拟了异重流的运动特征和形态,其前锋的潜行速度与实验结果相当吻合。该模型采用非结构同位网格上的SIMPLEC算法能适应复杂边界和地形,可应用于自然界实际环境中异重流的演进计算。
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| 关 键 词： | 斜坡 三维 异重流 紊流模型 数值模拟 |
| 文章编号： | 1001-6791（2006）03-0342-06 |
| 收稿时间： | 2004-12-09 |
| 修稿时间： | 2005-03-17 |
3-D numerical simulation of density currents' spreading on the slope |
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| LAI Xi-jun,WANG De-guan,JIANG Jia-hu,HUANG Qun.3-D numerical simulation of density currents'''' spreading on the slope[J].Advances in Water Science,2006,17(3):342-347. |
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| Authors: | LAI Xi-jun WANG De-guan JIANG Jia-hu HUANG Qun |
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| Affiliation: | 1.Nanjing Institute of Geography & Limnology, CAS, Nanjing 210008, China;2.College of Environmental Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | Many experiments,the analytic solutions and the numerical simulations are conducted to investigate density currents.But turbulence is usually neglected or sometimes considered by using the simple turbulence model among them.In this paper,a 3-D mathematic model with the explicit algebraic Reynolds stress/fluxes turbulence model (EARSM) is developed to simulate the anisotropic buoyant turbulent flows.The collocated,unstructured finite volume method is applied to solve the Navier-Stokes equations and the pressure coupling is treated using the SIMPLEC algorithm.The case of 3-D density currents' spreading on the slope with 15 angle is simulated Results show that the spreading velocity of the front computed at the present is consistent with the experiments.Also,the present model successfully reproduces the flow characteristic and the configuration of density currents,and shows its good convergent performance.The model can be extended to simulate density currents' spreading in natural environment with complex geometry and topology. |
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| Keywords: | slope 3-D density currents turbulence model numerical simulation |
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