| 长江口斜压诊断模式三维流场数值模拟 |
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| 引用本文： | 龚政,张长宽,金勇,张东生.长江口斜压诊断模式三维流场数值模拟[J].水科学进展,2004,15(3):300-306. |
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| 作者姓名： | 龚政 张长宽 金勇 张东生 |
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| 作者单位： | 1.水利部太湖流域管理局水利发展研究中心, 上海, 200434; |
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| 基金项目： | 水利部科技创新项目(CSX2000 57)，教育部科技研究重点项目(01100) |
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| 摘 要： | 建立了σ坐标系下长江口斜压诊断模式三维流场数学模型,采用k-kl二方程紊流闭合模型求解垂向涡粘系数,计算域内恒定、非均匀盐度场反映了计算域密度斜压效应。验证结果表明,斜压诊断模式的模拟成果较切合实际。模型成功复演了长江口水域由往复流向旋转流过渡的流场特性;潮波从四条汊道传入后在分汊口附近相遇形成多个会潮点,其位置随着径流的大小、潮汐的强弱、汊道的形态等因素而变化。
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| 关 键 词： | 长江口 斜压诊断模式 三维流场 数值模拟 |
| 文章编号： | 1001-6791(2004)03-0300-08 |
| 收稿时间： | 2003-03-06 |
| 修稿时间： | 2003年3月6日 |
3-D current numerical model for the Yangtze River estuary with baroclinic-diagnosis mode |
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| GONG Zheng,ZHANG Chang-kuan,JIN Yong,ZHANG Dong-sheng.3-D current numerical model for the Yangtze River estuary with baroclinic-diagnosis mode[J].Advances in Water Science,2004,15(3):300-306. |
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| Authors: | GONG Zheng ZHANG Chang-kuan JIN Yong ZHANG Dong-sheng |
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| Affiliation: | 1.Water Resources Development Research Center, Taihu Basin Authority, Shanghai 200434, China;2.College of Traffic and Ocean Engineering, Hohai University, Nanjing 210098, China;3.Shanghai Designing Institute of Reconnaissance, Shanghai 200434, China |
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| Abstract: | This paper presents a 3-D current numerical model for the Yangtze River estuary with baroclinic-diagnosis mode in vertical σcoordinate system.A vertical eddy-viscosity coefficient is obtained from the advanced k-kl turbulence closure model, and the density baroclinic effects are embodied by the 2-D invariable-uneven salinity field.It shows the results from baroclinic-diagnosis mode well consistent with reality.The transition feature from back and forth current to rotary current is re-acted successfully.In addition,several tidal junction points appeare near branch points when tidal wave propagate from four river forks, the position of which change with runoff,tide and topography. |
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| Keywords: | Yangtze River estuary baroclinic-diagnosis mode 3-D current numerical model |
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