Efficient and Reliable Advancing Divided-Layer Method for Boundary Layer Mesh

To accelerate boundary layer meshing for 3D complex configurations,an advancing divided-layer method based on a discrete medial surface is presented.For a given surface mesh bounding an arbitrary field,a tetrahedral background mesh only containing boundary nodes is generated by a constrained Delaunay triangulation method,and a discrete medial surface is created with the circumscribed sphere centers of all tetrahedrons.According to the distance from the discrete medial surface,boundary facets are divided into two categories:the open area facets with rapid advance and the narrow area facets with standard layer-by-layer advance.One of boundary layer meshes was generated on the NASA common research model in a single core of an Intel Xeon X5650 CPU.The result shows that the proposed method is over ten times faster than the conventional advancing layer method or the inflating method,and dividing millions of boundary facets only consumes a few seconds.