摘要
本文建立了一种用有限元法模拟自然河流平面变形的数学模型.模型考虑了二维水流挟沙力,并提出了一种处理固壁不可入边界条件的方法.用长江中游界牌河段的实测资料进行了验证计算,结果表明,水位、流速分布、含沙量分布及河床冲淤变化的符合程度均令人满意.
A two-dimensional mathematical model for suspended sediment transport in fluvial rivers is established in this paper.Some aspects,such as the sediment carrying capacity and the treatment of slip condition,are considered.A numerical method using finite Element method for modelling the ir- regular river bank is developed,It converges through a few times of iteration,an example is given. The computational results agree well with the field data.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1990年第6期92-99,共8页
Journal of Hohai University(Natural Sciences)
关键词
有限元
河流
水流
挟沙力
悬移质
river deformation
mathematical model
finite element method
diffusion equation of suspended load
sediment carrying capacity
