数値解析を用いた矩形容器内自励スロッシングの発生機構の解明 : 第1報, 水平平面噴流による自励スロッシングの数値シミュレーション  [in Japanese] Study on Growth Mechanism of Self-Induced Sloshing, Using Numerical Simulation : 1st Report, Numerical Simulation of Self-Induced Sloshing Caused by Horizontal Plane Jet  [in Japanese]

A self-induced sloshing is excited by the flow without any other external force. In a rectangular tank having a horizontal plane jet, the first-mode sloshing grew in a certain condition of the inlet jet velocity and the water level. In this study, the self-induced sloshing was simulated, using a two dimensional numerical simulation code. The code was based on the Boundary Fitted Coordinate (BFC) method with the height function. The results of the simulation agreed qualitatively with the experimental results, e. g. the sloshing occurrence condition. In order to investigate the growth mechanism of the self-induced sloshing, the fluctuation of the jet streak line was calculated using the simulated results. The dependency of the jet fluctuation on the self-induced sloshing was clarified qualitatively using the numerical simulation.