摘要
基于N-S方程和悬移质扩散方程,采用网格标记法(MAC)追踪自由水面,应用标准k-ε封闭方程建立了二维水流泥沙数学模型.运用数学模型对射流冲坑内的流场、泥沙浓度进行数值计算,得到了冲坑内流场、紊动特性及悬移质泥沙浓度的分布情况,并与实验数据进行了比较.结果显示,该数学模型具有较高的精度和适用性,能较好地模拟稳定冲刷坑内的流场和悬沙浓度分布.
A 2D flow-sediment numerical model is established in this study,and the flow field solver is based on the MAC（Mark and Cell） method for continuity equation and two-dimensional N-S equations with a standard k-ε closure.Besides the velocity,the characteristics of turbulent flow and the sediment concentration distribution in scour hole are simulated in the numerical model.Compared with the experimental data,the results show that the numerical model has a preferrable accuracy and reliability,and can better simulate the velocity and sediment concentration distribution in the scour hole.
出处
《水利水运工程学报》
CSCD
北大核心
2010年第2期28-33,共6页
Hydro-Science and Engineering
基金
国家自然科学基金资助项目(50479015)
教育部新世纪优秀人才支持计划(NCET-05-0710)
湖南省重点学科资助计划
长沙理工大学创新团队资助计划
关键词
数值模拟
冲刷坑
悬沙浓度分布
numerical model
scour hole
sediment concentration
