摘要
为了解二维潮流方程(在水深上求平均),本文给出了一种一般化了的有限差分格式。应用这个方法模拟了长江口的潮流,计算结果与现场观测资料相当一致。平面区域是由锐角三角形元素所组成。在节点上,一阶和二阶偏导数已被定义。在潮流基本方程中,水平涡动粘滞项也已考虑。这个方法有一个很大的优点,能灵活地模拟图形,即边界更精确和在感兴趣的区域能被任意分割。而且,这个方法是经济的。
This paper presents a,generalized finite difference scheme for the solution of the two-dimensional tidal current equations expressed as being,integrated over the vertical.In this paper the Changjiang Eiver Estuary is simulated in order to investigate the effectiveness of the method on tidal current.The computational results agree well with the tidal current field survey data.Plane domain is supposed to consist of triangular elements of weakly acute type:Partial derivatives of order 1 and 2 are defined at nodal points.In the basic equations of tidal current horizontal eddy viscosity term is also considered.This method has a great advantage of having the flexibility to express the configuration.That is,the boundary configuration of the model is more accurate,and an interested area of the computation by the method can be divided into any small elements,arbitarily.Moreover,the computational cost of this method ds cheaper.
作者
赵士清
Zhao Shiging(Nanjing Hydraulic Research Institute)
出处
《海洋与湖沼》
1985年第1期18-27,共10页
Oceanologia Et Limnologia Sinica
