《Gridgen经典培训教程》.ppt

Mixing Layer Types Creating Hybrid Grids Sometimes is may be desirable to have mixed layer types. In other words, have prism layers on some or most of the geometry surface and fill in with hex layer blocks. This type of construction is suitable for: Cases where certain parts of the geometry cannot be easily extruded. Cases where certain parts of the geometry require the resolution or distribution control of a structured block. In these instances, combo extrusion can often be effectively employed (as at right). If not, the prism blocks are to be extruded first, and the structured blocks then assembled from the exposed prism layer quad faces and additional structured domains as required. Review GridgenTraining In this session: Building 2D Structured Extruded Grids. Building 3D Structured Extruded Grids. Tutorial: “Swept Ramp: Advanced Multi Block Structured Grid.” Building 3D Unstructured Extruded Grids. Creating Hybrid Grids. Tutorial: “Droplet in a Cylinder: Hybrid Grid.” GridgenTraining In this session: Layer Manager. Tutorial: “Cubes and Spheres: Layer Manager.” Advanced Tools. Tutorial: “B-747 Nacelle: Working with an IGES Database.” Overview The Layer Manager Gridgen’s layer manager provides flexible control over what portions of a database model are displayed. It’s very similar in style to that of common CAD software packages. Indeed, the layer manager preserves layer information from the original CAD models when they are imported into Gridgen Each database entity can be assigned to only one layer (there are 1024 total layers available). Each layer can be likened to a transparency overlay, the user choosing which layers are visible at any given time in the Display Window. Once defined, the layer information is saved in the composite database file (.dba) for future editing sessions. The layer manager is accessed by clicking on the Layer Manager button in the MAIN MENU or the DATABASE COMMANDS menu (or via the M hot key). Layer Manager Hyp an