基于子域重构的扫掠体六面体网格划分方法

针对扫掠体连接其他实体造成扫掠面结构网格划分困难,导致扫掠法无法在扫掠体内生成六面体网格的问题,提出针对扫掠体的六面体网格划分方法.该方法对扫掠面进行拓扑分解,依据结构网格节点的排列要求和分解域的连接关系综合计算棱边单元划分数.结合超限映射法在分解域内填充结构网格,依据扫掠法的基本步骤生成六面体网格；对不能采用结构网格填充的扫掠面子域进行重构以隔离非结构网格,对扫掠面子域边界外、内的网格区域先后进行扫掠生成最终六面体网格.实例表明,该方法稳定、可靠,可以处理复杂的2.5维实体六面体网格生成问题.

Hexahedral mesh generation method for swept volume based on sub-domains reconstruction

Hindered by sub-domains generated by other volumes connecting to the swept volume to generate structured mesh on swept surface, sweeping method can not be applied to generate hexahedral mesh in swept volume. A novel hexahedral meshing method for swept volume was proposed in order to solve the problem. Swept surface was topological decomposed. The number of divisions of edge was comprehensive computed based on the requirement of nodes arrangement of structured mesh and connectivity of decomposed domain. Structured mesh was mapped to the decomposed domain using transfinite interpolation method. The final hexahedral mesh was generated following basic steps of sweeping method. For some swept surfaces cannot filled with structured mesh, sub-domains on the swept surface were reconstructed to isolate unstructured mesh. The final hexahedral mesh was generated by sweeping the mesh outside and inside the boundary of subdomains restructured early and late. Examples demonstrate that the proposed method is reliable and robust, which can handle the hexahedral mesh generation problem of complex two-and-one-half dimensional geometries.