摘要
通过对非结构网格剖分方法的研究 ,给出了在复杂通道内非结构网格生成过程中的几个重要步骤 .采用源项控制的方法来控制计算区域内的网格尺度分布 ,并利用非均匀有理B样条进行边界的拟合及重新离散 ,以满足边界上的网格尺度信息 .分别用Delaunay三角化方法和前沿推进法生成初始网格和内部网格 ,同时保证了几何边界的完整性和内部网格的质量及生成速度 .引入了整层加点和局域网格重组的方法 ,对前沿推进法进行了改进 ,并对具体的复杂几何通道进行了网格剖分 ,给出了剖分结果 .结果表明 ,该方法可以在一定程度上减少网格的判断与重组时间 ,从而提高了非结构网格的生成效率 .
Several important procedures of unstructured grid generation in complex flow fields are represented. The source terms are used to control the distribution of the mesh unit size. B-spline curve is applied to reform the geometric boundary, which ensures the proper mesh dimensions of the boundary nodes. The Delaunay triangulation method and advancing-front method are used to generate the initial grid system and inner grid system accordingly, which ensures the completeness of the boundary and the quality and efficiency of the inner grids. The advancing-front process is improved by using the method of entire layer noses insertion and local mesh reconnection. Finally, several grid generation results in complex flow fields are shown to demonstrate the presented method.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2001年第10期1062-1066,共5页
Journal of Xi'an Jiaotong University
