采用现代三维运动界面追踪技术VOF(volume of fluid)方法和标准模型,耦合求解对边墩附近三维流场进行了合理模拟,通过对边墩周围不同垂直面和水平面流速进行分析,得出边墩附近的流场特性及规律。对三维运动界面追踪技术模型、模型的基...采用现代三维运动界面追踪技术VOF(volume of fluid)方法和标准模型,耦合求解对边墩附近三维流场进行了合理模拟,通过对边墩周围不同垂直面和水平面流速进行分析,得出边墩附近的流场特性及规律。对三维运动界面追踪技术模型、模型的基本方程、模型的边界条件及初始条件模型验证、边墩附近三维流场等作了简要描述。展开更多
This paper presents an experimental study of the overtopping breach of homogeneous non-cohesive levee or dike in a 180o bend rectangular flume. Detailed experimental and numerical results provide information on the br...This paper presents an experimental study of the overtopping breach of homogeneous non-cohesive levee or dike in a 180o bend rectangular flume. Detailed experimental and numerical results provide information on the breach flow discharge and longitudinal and transversal breach profiles for this type of levee. It is indicated that the water level and the flow discharge in the river and the levee material properties are significant influencing factors for the breach evolution. The plane form of the breach is approximately an asymmetrical hyperbola. A formula with a non-constant flow factor is proposed to compute this kind of breach discharge.展开更多
文摘采用现代三维运动界面追踪技术VOF(volume of fluid)方法和标准模型,耦合求解对边墩附近三维流场进行了合理模拟,通过对边墩周围不同垂直面和水平面流速进行分析,得出边墩附近的流场特性及规律。对三维运动界面追踪技术模型、模型的基本方程、模型的边界条件及初始条件模型验证、边墩附近三维流场等作了简要描述。
基金Project supported by the National Basic Research and Development Program of China (973 Program, Grant No.2011CB403304)the National Natural Science Foundation of China (Grant No. 11272240)
文摘This paper presents an experimental study of the overtopping breach of homogeneous non-cohesive levee or dike in a 180o bend rectangular flume. Detailed experimental and numerical results provide information on the breach flow discharge and longitudinal and transversal breach profiles for this type of levee. It is indicated that the water level and the flow discharge in the river and the levee material properties are significant influencing factors for the breach evolution. The plane form of the breach is approximately an asymmetrical hyperbola. A formula with a non-constant flow factor is proposed to compute this kind of breach discharge.