Thermohydraulics in Confined Water Masses Focusing on its Geographical Effects

首先，为了研究承压水体中浅部区域和深部区域之间的水平热交换，Murota和Joshoku使用二维容器进行了实验室实验。二是发展了复杂水平地理条件下的内假潮运动理论。通过与实验的比较，验证了他们的理论。最后，他们实验研究了机械搅拌和热搅拌相结合引起的垂直混合过程。村冈在中禅寺湖进行了实地调查，重点是近岸区的边界混合现象。他发现那里的内部波动频率大约是布伦特-维萨拉频率的两到三倍。他还发展了一个理论的内部波变形的倾斜床。Nakatsuji将k-<epsilon>湍流模型应用于浮力表面射流的分析。他不仅成功地再现了速度场和浮力场，而且还再现了与边界效应有关的垂直环流。他将二维模型扩展到三维领域，分析了大坂湾的河流羽流发展和潮流。

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.