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A new conforming hybrid mesh generation method is proposed and applied to generate mesh for three-dimensional solids with open-ended tubular holes. A pyramidal element generation method is presented to solve the non-conforming problem. The procedure consists of five steps. At first, surfaces of tubular holes are recognized and discretized. Secondly, the regions around the tubular holes are presented by hexahedral elements. Then, the surface triangular mesh is generated. After that, the pyramid elements are constructed. Finally, the tetrahedral mesh is generated to tessellate the rest of the domain. By the proposed method, high-quality hybrid mesh can be automatically created. And the number of the obtained elements is far less than the all-tetrahedral mesh. Several examples are presented to demonstrate the robustness and efficiency of our method.

Conforming Hybrid Mesh Generation for Solids with Tubular Holes