Thermohydraulics in Confined Water Masses Focusing on its Geographical Effects

承压水域热水力学关注其地理效应

• 批准号: 59460143
• 负责人: MUROTA Akira
• 金额: $ 4.03万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1984
• 资助国家: 日本
• 起止时间: 1984 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59460143/
• 关键词: Thermohydraulics; Density Current; Lake; Reservoir; Mixing; Numerical Analysis; 湖沼; 貯水池

First, to examine the horizontal heat exchange between the shallow region and deep region in a confined water mass, Murota and Michioku carried out a laboratory experiment using a two dimensional container. Second, they developed a theory on the internal seiching motion in complicated horizontal geographical conditions. Their theory is verified by comparing it with the experiments. Finally they experimentally examined the vertical mixing process induced by the combination of the mechanical and thermal stirring.Muraoka carried out a field survey in Lake Chuzenji focusing on the boundary mixing phenomenon in the nearshore zone. He found that the frequency of the internal fluctuation there was about two or three times order of the Brunt-Vaisala frequency. He also developed a theory for the internal wave deformation on the sloping bed. The theory was verified experimentally.Nakatsuji applied the k- <epsilon> turbulence model to the analysis of the buoyant surface jet. He succeeded in reproducing not only the velocity and buoyancy fields but also the appearance of the vertical circulation associated with the boundary effects. Extending the two-dimensional model to the three-dimensional fields, he analyzed the river plume development and the tidal current in Osaka Bay.

首先，为了检查浅水区和深水区域之间的水平热交换，Murota和Michioku使用二维容器进行了实验室实验。其次，他们在复杂的水平地理条件下开发了一种关于内部清理运动的理论。通过将其与实验进行比较来验证它们的理论。最后，他们通过实验检查了机械搅拌和热搅拌的组合引起的垂直混合过程。Muraoka在Chuzenji湖进行了一次现场调查，重点是近岸区域的边界混合现象。他发现，内部波动的频率大约是首当其冲频率的两次或三倍。他还开发了一种用于倾斜床上内波变形的理论。该理论经过实验验证。Nakatsuji将K- <epsilon>湍流模型应用于浮力表面射流的分析。他不仅成功地繁殖了速度和浮力场，而且还繁殖了与边界效应相关的垂直循环的外观。他将二维模型扩展到三维领域，分析了大阪湾的河羽发展和潮流。

项目成果

Murota,A. and K.Nakatsuji: "Effulent Expansion from River-Mouth-Field Observations and Numerical Experiments" Proc. Int. Sympo. Physical Process in Estuaries. (1986)

室田，A.

平田健正,村岡浩爾: 土木学会水理講演会論文集. 29. 377-382 (1985)

Kenmasa Hirata、Koji Muraoka：日本土木工程师学会水力学会议记录，29. 377-382 (1985)。

室田明,中辻啓二: 土木学会水理講演会論文集. 30. 715-720 (1986)

Akira Murota、Keiji Nakatsuji：日本土木工程师学会水利会议记录 30. 715-720 (1986)。

Murota,A.;K.Nakatsuji: Proc.Int.Sympo.Physical Process in Estuaries. (1986)

Murota,A.；K.Nakatsuji：Proc.Int.Sympo.河口的物理过程。

室田明,道奥康治: 土木学会論文集. 375. 171-179 (1986)

Akira Murota，Yasuharu Michio：日本土木工程师学会会议记录 375. 171-179 (1986)。