Simulation of The Free Surface and Flow FieldsInduced by Dam Breaking Using Level Set Method

• Main Authors: Ai-wei Lu, 盧艾偉
• Other Authors: Ching-Jer Huang
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/08793927035555762405

碩士 === 國立成功大學 === 水利及海洋工程學系碩博士班 === 96 === In this study numerical model was developed to solve the unsteady two-dimensional Reynolds Averaged Navier-Stokes (RANS) equation and the turbulent k-e equations for simulating the evolution of breaking water surface generated by a moving plate. A hybrid particle level set method was adopted to capture the complex free surface evolution, beginning from the steepening of the wave profile to the wave breaking. Accuracy of the numerical model was confirmed by solving the Zalesak problem and moving wall problem. After having verified the accuracy of the present numerical scheme, evolution of the overturning waves generated by a moving plate and the associated flow fields and velocity profiles within the bottom boundary layer have been revealed to details. Our numerical simulation shows that as the speed of the plate increases, due to the reattachment of the splash-up, a clockwise vortex is formed in the flow. Furthermore, when wave breaking occurs, the fluid particles within the bottom boundary layer show a tendency to move upward.