An automatic hexahedral mesh generation for high-quality mesh by deformation and tree structure

An automatic mesh generator for hexahedral elements has already been proposed. However, the application of this generator to a model with both the hexahedral and the cylindrical objects results with generated meshes with large number of flat finite elements. It is known that a large number of flat elements lead to much lengthy finite element analysis (FEA) and lower accuracy of the obtained results. Therefore, the development of the versatile and high-quality automatic hexahedral mesh generator for models consisting hexahedral and cylindrical objects in the same model is strongly desired. In the proposed generation method, where the geometrical change of the model is employed, the generated mesh is composed mainly of well-shaped hexahedral elements. Moreover, the same number of boundary nodes for imposing periodical boundary conditions can be generated.