| 湖泊三维风生流隐式差分模型的研究 |
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| 引用本文： | 黄平,毛荣生.湖泊三维风生流隐式差分模型的研究[J].湖泊科学,1997,9(1):15-21. |
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| 作者姓名： | 黄平 毛荣生 |
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| 作者单位： | 中山大学环境科学系!广州510275(黄平)，武汉水利电力大学河流系!武汉430072(毛荣生) |
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| 摘 要： | 建立了湖泊三维风生流的隐格式差分模型，通过对该模型计算稳定性的分析发现，它的时间步长的取值具有较大的灵活性．该模型波用于武汉市墨水湖的民生流模拟，实例计算表明该模型计算结果合理，能较好地反映湖泊风生流的流态特征．
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| 关 键 词： | 墨水湖 风生流 隐格式差分 三维数值模拟 |
| 收稿时间： | 1995/8/12 0:00:00 |
| 修稿时间： | 1996/2/28 0:00:00 |
A 3-dimension implicit finite-difference model for wind-driven water current in Moshui Lake |
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| Huang Ping and Mao Rongsheng.A 3-dimension implicit finite-difference model for wind-driven water current in Moshui Lake[J].Journal of Lake Science,1997,9(1):15-21. |
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| Authors: | Huang Ping and Mao Rongsheng |
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| Institution: | Department of Environmental Sciences, Zhongshan University, Guangzhou 510275 and Department of Rivers, Wuhan University of Hydraulic and Electric Engineering, Wuhan 430072 |
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| Abstract: | Up to now, three-dimension (3-D) finite difference models have been extensively used to simulate water current in coastal areas, lakes and reservoirs. The explicit time integration method is used in many of such models and thus the time step size is limited by the well-known CFL sta- bility criterion.A three-dimension implicit finite difference model for wind-driven water current in a lake is developed in this paper. Stress terms,pressure terms and Corilic terms in the governing equations are represented implicitly in the model, and through analysing the stability of difference scheme,it is discovered that time step size of the scheme is essentia1ly independent of CFI, criterion. The proposed model is thus valuable in reducing compute time.The proposed model is first validated by a particular case where analytic solution is available in comparison with difference solution of the model,and then it is used to simulate wind-drivern water current in Moshui Lake. The real case shows that the calculated results of the model are rational and available,and can describe better the structural characteristic of wind-driven water currcnt in a lake. |
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| Keywords: | Moshui Lake wind-driven water current implicit finite difference three-dimension numerical simulation |
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