Local mesh types can be selected to maximize mesh quality and minimize mesh generation time. To generate the mesh on the passenger car in Figure 2, a triangular surface mesh was generated in GeoMesh and read into TGrid 3.0. Triangular prisms were then grown away from the surface mesh for accurate resolution in the boundary layer. TGrid 3.0 automatically retriangulated the adjacent symmetry plane, after which the remaining volume was automatically filled with tetrahedra. Prismatic layers can be grown from triangular, quadrilateral, and mixed surface meshes.
Several methods are available for controlling growth rates.
Layers can be extruded along specified vectors or grown using an advancing front algorithm that attempts to preserve mesh quality as the layers grow away from irregular surfaces. Viscous hybrid mesh on an automotive exterior. Prisms provide an efficient high-quality mesh around the vehicle surface, while you retain the ease of triangular surface meshing.