Automatic cell sizing criteria in cfMesh

Mesh generation is a complex task, especially in very complex geometries occurring in industrial practice, hence an automatic method for robust generation of computational meshes is needed. The geometries occurring in the industrial practices are mostly designed by teams of engineers with various expertise in using CAD tools that often results in defects that have to be cleaned prior to meshing. Inside-out meshing methods have received attention due to their insensitivity to the quality of the input geometry. The meshing process starts from an initial mesh, which usually does not conform to the geometry, and this initial mesh undergoes a series of modifications in order to constrain it to the input geometry and to achieve desired mesh quality requested by the CFD solver. In order to generate a high-quality mesh, the cell size in the input mesh shall be smaller than the feature size at every location in the mesh. The document presents a method for automatic cell sizing that estimates curvature and proximity at any given location in the mesh, and is applicable to low-quality input geometry. The method requires little user input and is capable of generating meshes for geometries of industrial interest in a short period of time.