曲线拟合坐标变换技术在三角形网格生成中的应用

Application of curvilinear coordinate transformation technique to generation of triangle grid system

将拟事坐标变换技术应用于三角形网格生成中，形成一种方便、有效的三角形网格生成方法。该方法直接利用边界网格节点的分布信息来控制区域内部网格节点的分布，在数值模拟河道、湖泊等复杂边界的地流速场时，可快速获得一种适应物理量场变化情形的三角形网格系统，使基差该网格系统的流场计算精度明显提高。

A convenient and effective triangle grid generation method is obtained by applying curvilinear coordinate transformation technique. The interior grid distribution is controlled by prior selection of grid points distribution along the boundaries of simulating region. The generated triangle grid system is adaptive to the change of flow parameter in numerical solution of 2D river flow with complicates boundaries, and the precision of computed results are improved.