天然分汊河流的平面二维数值模拟

Two-dimensional numerical modelling of branching river

利用边界拟合坐标变换系统下的计算区域分解－组合处理技术、支流耦合迭代计算方法、支流迭合对接型坐标变换网格与非对接型流网正交坐标系统等新思想建立了适应很复杂河道情况与水力条件的平面二维天然分汉河流的流场与浓度场的数学模型．并通过计算实例验证了模型在工程中应用的可靠性与有效性．

A 2-D numerical model for flow and concentration fields in natural branching river has been developed by using the coordinate transformations.In the model,the net-domain zoning technique,the branch iterative coupling method,the patched branch overlapping coordinate grids and the unpatched streamline orthogonal coordinate system have been used. The reliability and applicability of the model have also been verified by model test.