摘要
利用数值方法模拟研究了两相流模型中曳力模型对输沙率的影响.结果表明,当选取的曳力模型不同时,输沙率沿流向的变化趋势基本相同,摩阻风速越大其输沙率稳定值越大,稳定值距离越大.与输沙率稳定理论值对比时,两种模型的计算结果均有偏差,但随着摩阻风速的增大,偏差逐渐减小.模拟结果比理论值偏大是由于模拟计算的沙粒的跃移轨迹长度较大造成.
Using the numerical simulation method, the effects of different drag model of two-phase model on sediment transport rate are analyzed.The results show that the evolution of sediment transport rate in distance with different drag model have a same tendency.steady value and steady length of sediment transport rate increase with the increase of friction velocity. Comparing with the theory results, there are difference between calculation results of two models and stability theoretical value. The difference is due to the longer length of saltation which is simulated by two drag models. But the difference between theoretical and simulation results is becoming smaller with the increase of friction velocity.
出处
《喀什大学学报》
2017年第3期41-44,共4页
Journal of Kashi University
基金
新疆维吾尔自治区高校科研计划项目(XJEDU2014S056)
国家自然科学基金项目(11464022)
喀什师范学院校内重点课题(20132455)
关键词
两相流
曳力模型
输沙率
Two phase model
Sediment transport rate
Sand transport rate
