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采用不规则三角形网格进行二维不恒定流的差分计算,弥补了矩形网格对边界、地形适应性差这一不足,本文对三角形网格的差分格式及计算方法作了具体的探讨和实例计算. 计算结果表明:本模型具有良好的稳定性及计算精度.它既具有矩形网格差分法形式简单、省机时的优点,又具有容易适应边界、节点可随意布置、易于加密网格的特色.当采用三角形与矩形的混合网格时,效果更好,是值得进一步推广的计算格式.
The use of irregular triangular meshes for the two-dimensional unsteady flow differential calculation, to make up for the lack of adaptability of the rectangular grid to the border, poor terrain, triangular grid in this paper, the differential format and calculation methods for a specific discussion and case calculation The calculation results show that the model has good stability and calculation precision.It has the advantages of simple and time-saving rectangular grid difference method, easy to adapt to the boundary, nodes can be arranged freely, easy to encrypt the grid features When using a mixed triangle and rectangle grid, the effect is better, is worth further promotion of the calculation format.