摘要
基于三角形网格划分,采用有限元方法,建立了河道平面二维水流泥沙数学模型。采用质量集中的简化处理和预估校正的时间推进算法,较好地解决了有限元计算存储量和计算速度问题。以空腔流和突扩段两种情况为例对模型进行了检验计算,结果表明,模型能较好地模拟河道水流泥沙运动及河床变形情况,且计算稳定性好、速度快、精度较高。
Based on triangular grids, the planar 2-D flow and sediment mathematical model is established by the finite element method. Since the mass concentration and the pre-estimated and verified iteration are used to solve the equations, the questions of memory units and calculation velocity are settled quite well. Simulation calculation is carried out on the cavity recirculation and single-sudden-expansion channel. The results show that flow field and sediment distribution are simulated successfully using the model and the calculations are stable, fast and accurate.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2002年第6期665-669,共5页
Advances in Water Science
基金
国家自然科学基金
长江水利委员会联合资助重大项目(50099620)
长江科学院基金项目
关键词
水流泥沙
平面二维
有限元
数学模型
Computer simulation
Finite element method
Mathematical models
Sediments
Two dimensional
