Abstract: In order to effectively meet the requirements of h-adaptive mesh remeshing, we proposed a local tetrahedral mesh remeshing by advancing front method and Delaunay algorithm. Firstly, the order from line to surface and from surface to body was adopted to ensure the coordination of the overall network in the process of remeshing. Secondly, the local size function was used to ensure the smooth transition of mesh size. Finally, the projection method was used to make the mesh be shape-preserving. The simulation results show that the algorithm is suitable for the complex computer aided design (CAD) model with multiple parts, the mesh is closer to the real geometry in the process of h-adaptive encryption, and the mesh quality can be guaranteed after remeshing.

Key words: adaptive mesh technique, local remeshing, tetrahedra mesh, complex CAD model