摘要
本文采用三维水沙数学模型计算水库坝前冲刷漏斗,运用随机游动理论统计方法分析泥沙运动及淤积特性。针对冲刷漏斗和河床地形的几何形态比较复杂的特点,采用三维泊松方程对求解区域进行曲线贴体坐标变换,使曲线网格边界可以完全贴合在物理边界上,从而提高了计算精度。计算结果与大量实测结果相吻合,对工程实际有一定参考价值,为优选建筑物布置最佳方案提供设计依据。
A 3D water and sediment mathematical model is applied to the scouring funnel in front of the sand-flash channel of the Reservoir. By using the random walk statistical method, the single and group settlings of sediment grains in the current were researched. The mathematical model and the calculation equations were also established. Due to the complex geometry of the bed geographies and the scouring funnel in front of the dam, 3D Poisson＇s equations are adopted to transform the calculating region through the technique of the curvilinear body-fitted coordinate so that the boundaries of curvilinear grids can entirely coincide with physical boundaries and the conditions of boundaries will become simple and accurate, and the precision of calculation can be improved. The results of computation are in good agreement with the actual situation.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2007年第2期254-259,共6页
Chinese Journal of Hydrodynamics
关键词
水沙动力学
冲刷漏斗
三维流场
随机游动
水库
sediment dynamics
scouring funnel
three-dimensional flow field
random walk
reservoir
