| 水质大涡模拟数学模型研究 |
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| 引用本文： | 张昌兵,熊朝坤,桂林,刘华,莫政宇.水质大涡模拟数学模型研究[J].水科学进展,2004,15(4):431-435. |
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| 作者姓名： | 张昌兵 熊朝坤 桂林 刘华 莫政宇 |
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| 作者单位： | 1.四川大学水电学院, 四川, 成都, 610065; |
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| 基金项目： | 四川大学青年科学研究基金资助项目(0030605505009) |
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| 摘 要： | 建立了基于弱可压缩流基础上的水质大涡模拟数学模型及污染物质扩散系数与平均运动的关系。数值计算采用有限体积法和预测校正法,固壁边界条件采用"部分滑移条件"。并应用该模型对重庆嘉陵江、长江两江交汇段的流场,污染物质浓度分布进行了计算,计算结果与实测值比较吻合。研究表明,横向扩散与流动状态有关,当支流流量相对较小时,横向扩散较弱,形成岸边污染带,当支流流量相对较大时,横向扩散较强,污染带向江心移动。
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| 关 键 词： | 水质 大涡模拟 有限体积法 污染带 扩散系数 |
| 文章编号： | 1001-6791(2004)04-0431-05 |
| 收稿时间： | 2003-04-15 |
| 修稿时间： | 2003年4月15日 |
Research on large eddy simulation for water quality |
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| ZHANG Chang-bing,XIONG Chao-kun,GUI lin,LIU hua,MO Zheng-yu.Research on large eddy simulation for water quality[J].Advances in Water Science,2004,15(4):431-435. |
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| Authors: | ZHANG Chang-bing XIONG Chao-kun GUI lin LIU hua MO Zheng-yu |
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| Affiliation: | 1.School of Hydraulic Engineering, Sichuan University, Chengdu 610065, China;2.Department of Energy Resource and Environmental Engineering, Xihua University, Chengdu 610039, China |
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| Abstract: | A large eddy simulation approach for the water quality based upon the weakly compressible flow is developed, and the relationship between the diffusion coefficients and the average velocity is established. The finite volume approach in space and predictor-corrector method in time is used, and "partial slip condition" is applied to the solid wall boundary condition. This model is employed in simulating the concentration distribution of the pollutant transport at the cross area between the Jialing River and the Yangtze River, and the results show that the transverse diffusion is weak and the bank-side pollutant zone appears when the discharge of the branch river is relatively small, on the contrary, the transverse diffusion is strong and the pollutant zone moves to the heart of the main river when the discharge of the branch river is relatively large. |
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| Keywords: | water quality large eddy simulation finite volume approach pollutant zone diffusion coefficients |
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