Multi-Zone

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Multi-zone meshing starts from automatic surface blocking. Surfaces with 4ish sides are mapped (structured) and other surface patches are free (unstructured). You can set the mesh type for unstructured faces as "all Tri", "quad dominant", " quad with 1 tri" or "all quad". The automatically generated surface blocks can be manipulated, corners merged, faces split, etc.

If a closed volume is created, the user can initiate a volume fill. The fill can also include an OGRID boundary layer on certain parts if desired. The ogrid layer is created by sweeping out the surface by a certain distance. mapped faces become structured blocks and free faces become swept blocks. Any remaining volume can be filled with mapped blocks (if possible) or unstructured fill blocks. The unstructured blocks can be filled with your choise of; delaunay tetra, advancing front tetra, cartesian hexa core, or hexa dominiant mesh. All the zones are conformal. Hexas are connected to Tetras with Pyramids. This method automatically gives you top quality hexa boundary layers and then fills the less critical, but more difficult to capture, regions with unstructured mesh. For the minimum effort, put the right mesh in the right place.

EXAMPLES

This is a coarse external aero example generated semi-automatically in 15 minutes.

This FEA example was automatically blocked in seconds. Many surfaces were mapped, some others were left free (quad dominant)		The volume fill was done with Hexa dominant fill in most pieces, and Delaunay Tetra in the Gear.

Imported Geometry	Automatic Blocking with Ogrids and Structured Fill	Pure Hex Mesh

Blocking was generated automatically, but then some merging was needed due to bad surface connectivity. Once the surface blocking formed a closed volume, 2Dto3D fill was done with an OGRID layer.
The result was a pure Hex mesh
This is a cut away view. The orientation of the core blocks was determined by the original surface patches.

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