| 通量差分裂格式的二维水流水质计算的适用性分析 |
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| 引用本文： | 丁玲,逄勇,赵棣华,吴建强,吕俊.通量差分裂格式的二维水流水质计算的适用性分析[J].水科学进展,2004,15(5):561-565. |
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| 作者姓名： | 丁玲 逄勇 赵棣华 吴建强 吕俊 |
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| 作者单位： | 1.河海大学环境科学与工程学院, 江苏, 南京, 210098; |
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| 基金项目： | 国家高技术研究发展计划资助项目(2003AA6011002)，江苏省自然科学基金资助项目(BK2002067)~~ |
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| 摘 要： | 将通量差分裂(FDS)格式应用于二维水流水质数值模拟中.应用若干理想条件下的简化模型对格式的计算精度进行分析,结果表明:FDS格式不仅能高精度地模拟浓度梯度较缓的污染物稳定排放情况,且其二阶格式能高分辨率捕俘水质间断,与理论值吻合很好,说明FDS二阶格式能高精度地计算污染物间断排放引起的大浓度梯度或水质突跃情况.该格式在长江南通江段水环境数值模拟中的应用验证了它的实际应用能力.
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| 关 键 词： | 通量差分裂格式 二维水流水质模型 计算精度 |
| 文章编号： | 1001-6791(2004)05-0561-05 |
| 收稿时间： | 2003-05-28 |
| 修稿时间： | 2003年5月28日 |
Analysis of applicability of flux difference splitting scheme on 2D flow-pollutant calculation |
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| DING Ling,PANG Yong,ZHAO Di-hua,WU Jian-qiang,LU Jun.Analysis of applicability of flux difference splitting scheme on 2D flow-pollutant calculation[J].Advances in Water Science,2004,15(5):561-565. |
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| Authors: | DING Ling PANG Yong ZHAO Di-hua WU Jian-qiang LU Jun |
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| Affiliation: | 1.College of Environment Science and Engineering, Hohai University, Nanjing 210098, China;2.Nanjing Hydraulic Research Institute, Nanjing 210029, China;3.Guangxi Hydrology and Water Resource Bureau, Nanning 530023, China |
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| Abstract: | In this paper, The flux difference splitting (FDS) scheme is applied to two-dimension flow-pollutant numerical simulation. Some simplified models in ideal conditions are used to analyze the accuracy of FDS scheme. The model of steady point source discharge shows high accuracy. To reduce numerical diffusion in big concentration grades, a limited flux is added to the first order scheme so as to derive the second order scheme. The results of water quality discontinuities model prove that FDS second order scheme can catch discontinuities with so high resolution that it can accurately simulate big concentration grades or abrupt water quality jump. The successful application in water environment numerical simulation of Nantong section of Yangtze River ulteriorly validates the practical application ability of FDS scheme. |
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| Keywords: | flux difference splitting scheme two-dimension flow-pollutant model calculation accuracy |
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