Optimization of Numerical Models for Environmental Dynamics in Closed Water Basins

封闭水域环境动力学数值模型的优化

• 批准号: 16510014
• 负责人: KIMURA Ichiro
• 金额: $ 1.54万
• 依托单位: Matsue National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16510014/
• 关键词: CFD; Closed Water Basin; Environmental Dynamics Model; Turbulence Model; Open Channel Flows; Brackish Lake; 環境動態シミュレーション; 保存系スキーム; 混合密度流; 塩水楔; 環境動態シミュレーションモデル; 保存形スキーム; 密度混合流

Closed water basins such as lakes, inner bay, etc., have serious problem on water quality due to the lack of water exchange with outer fresh water. It is therefore important and urgent require to develop a reliable numerical model, which can quantitatively predict behavior of flow and contamination dynamics. Numerical approach seems to be effective for such purpose from practical and economic points of view. However, it is not easy to increase dramatically the accuracy of numerical model because the model have a multiplex structure composed of many modules, i.e., numerical scheme, turbulence models, source, sink and transportation of contamination, etc. and each module requires simplification of real phenomena. So far many models were proposed for every module though the model performances have not been sufficiently elucidated yet.The objective of this research is optimization of the numerical model for environmental dynamics in closed water basins, which can predict flow and contamination not only qualitatively but also quantitatively. The research can be decomposed into two parts, namely, the basic part and the application part. In the basic part, various numerical schemes, turbulence models and contamination transport models were comparatively examined focusing on conservation, numerical viscosity and CPU time. In the application part, practical closed water areas were targeted. We studied various areas with different spatial scales, such as, Lake Biwa (largest lake in Japan), Lake Shinji and Lake Nakaumi (brackish lakes connected with a river), Ago Bay and underground area. Through these application data, we could elucidate advantage and shortcoming of the numerical models

封闭水域，如湖泊、内湾等，由于缺乏与外部淡水的水交换，水质存在严重问题。因此，建立一个可靠的数值模型，定量地预测水流和污染物的动力学行为，是一项重要而紧迫的任务。从实用和经济的角度来看，数值方法似乎是有效的。然而，由于数值模式是由多个模块组成的复合结构，数值格式、湍流模型、污染源、污染汇和污染物输运等，每个模块都要求对真实的现象进行简化。目前，针对每个模块提出了许多模型，但模型性能还没有得到充分的阐明。本研究的目的是优化封闭水域环境动力学数值模型，使其不仅能够定性地预测水流和污染，而且能够定量地预测污染。本文的研究可分为基础研究和应用研究两部分。在基础部分中，对各种数值格式、湍流模型和污染物输运模型进行了比较，重点考察了守恒性、数值粘性和计算时间。在应用部分，以实际封闭水域为对象。我们研究了具有不同空间尺度的各种区域，例如，琵琶湖（日本最大的湖泊），新知湖和中海湖（与河流相连的咸水湖），Ago湾和地下区域。通过这些应用数据，我们可以阐明数值模式的优点和不足

项目成果

二次元及び三次元RANSモデルによる浅水格子乱流の数値解析

使用二维和三维 RANS 模型对浅水网格湍流进行数值分析

• 发表时间: 2007
• 期刊: 土木学会水工学論文集 Vol.51
• 作者: 岡田往子;平井昭司;Shoji Hirai;平井昭司;岡田往子;Shoji Hirai;Shoji Hirai;Yukiko Okada;木村一郎
• 通讯作者: 木村一郎

Computations of Turbulence Structures in Free-Surface Mixing Layers under Different Depths

不同深度下自由表面混合层湍流结构的计算

• 发表时间: 2005
• 期刊: Proceedings of 30th IAHR Congress, Soul, Korea
• 作者: 岡田往子;平井昭司;Shoji Hirai;平井昭司;岡田往子;Shoji Hirai;Shoji Hirai;Yukiko Okada;木村一郎;Nenad JACIMOVIC;平井昭司;Ichiro KIMURA;加藤将彦;Ichiro KIMURA;高野元志;村岡弘一;Nenad JACIMOVIC;木村一郎;Shoji Hirai;Ichiro KIMURA;Masahiko Kato;Motoyuki Takano;木村一郎;Ichiro KIMURA;Koichi Muraoka;Nenad JACIMOVIC;Ichiro KIMURA;小畑めぐみ;木村一郎;木村一郎;Ichiro KIMURA
• 通讯作者: Ichiro KIMURA

Fundamental Studies on Salt Water Current Advancing into a Brackish Lake by Laboratory Tests and 3D Computations

通过实验室测试和 3D 计算对咸水流推进咸水湖进行基础研究

• 发表时间: 2006
• 期刊: Proceedings of 15th Congress of APD-IAHR and Int. Symposium on Maritime Hydraulics, Chennai, INDIA
• 作者: 岡田往子;平井昭司;Shoji Hirai;平井昭司;岡田往子;Shoji Hirai;Shoji Hirai;Yukiko Okada;木村一郎;Nenad JACIMOVIC;平井昭司;Ichiro KIMURA;加藤将彦;Ichiro KIMURA;高野元志;村岡弘一;Nenad JACIMOVIC;木村一郎;Shoji Hirai;Ichiro KIMURA;Masahiko Kato;Motoyuki Takano;木村一郎;Ichiro KIMURA
• 通讯作者: Ichiro KIMURA

Computations of 2D Shallow Mixing Layers in Open Channel Flows Using a Modified Depth-averaged Model

使用改进的深度平均模型计算明渠流中的二维浅混合层

• 发表时间: 2005
• 期刊: Proceedings of the 4th International Symposium on Environmental Hydraulics and 14th Congress of Asia and Pacific Division, IAHR, Hong Kong, China Vol.1
• 作者: 岡田往子;平井昭司;Shoji Hirai;平井昭司;岡田往子;Shoji Hirai;Shoji Hirai;Yukiko Okada;木村一郎;Nenad JACIMOVIC;平井昭司;Ichiro KIMURA;加藤将彦;Ichiro KIMURA;高野元志;村岡弘一;Nenad JACIMOVIC;木村一郎;Shoji Hirai;Ichiro KIMURA;Masahiko Kato;Motoyuki Takano;木村一郎;Ichiro KIMURA;Koichi Muraoka;Nenad JACIMOVIC;Ichiro KIMURA;小畑めぐみ;木村一郎;木村一郎;Ichiro KIMURA;Ichiro KIMURA
• 通讯作者: Ichiro KIMURA

湖に遡上する高塩分水塊の挙動とその制御に関する数値解析

高盐度水团逆流流入湖泊的行为与控制的数值分析

• 发表时间: 2005
• 期刊: 土木学会第60回年次学術講演会講演概要集 (CD-ROM)
• 作者: 岡田往子;平井昭司;Shoji Hirai;平井昭司;岡田往子;Shoji Hirai;Shoji Hirai;Yukiko Okada;木村一郎;Nenad JACIMOVIC;平井昭司;Ichiro KIMURA;加藤将彦;Ichiro KIMURA;高野元志;村岡弘一;Nenad JACIMOVIC;木村一郎;Shoji Hirai;Ichiro KIMURA;Masahiko Kato;Motoyuki Takano;木村一郎;Ichiro KIMURA;Koichi Muraoka;Nenad JACIMOVIC;Ichiro KIMURA;小畑めぐみ;木村一郎;木村一郎;Ichiro KIMURA;Ichiro KIMURA;Ichiro KIMURA;Ichiro KIMURA;小畑めぐみ;木村一郎;小畑めぐみ
• 通讯作者: 小畑めぐみ