In this tutorial example, you will use the Ansys ICEM CFD MultiZone meshing method to automatically hybrid mesh a section of HVAC duct.

This mesher is ideal for situations where a high quality boundary layer mesh is needed, but it would be difficult to lay out a structured grid to fill the volume. It is particularly designed for external aerodynamics where the boundary layer is critical and the volume around it can be very complicated.

The MultiZone process starts with surface blocking extracted from the geometry topology and then extrudes/sweeps these blocks into the volume to create the high quality boundary element zones (Ogrid). The remainder of the complex volume is filled by a variety of methods including mapped hexa blocks, swept blocks or unstructured mesh zones (which can be filled with a variety of unstructured methods available). Where possible, the MultiZone tool automatically subdivides the volume and can handle multi-source & target and multi-direction sweeping based on the robust ICEM CFD Hexa blocking framework. In addition, ICEM CFD Hexa blocking tools (Adjust Mesh distribution, Move vertices, Align verts, Check quality, Smooth, etc.) are available to interactively improve the mesh as necessary.