Ansys Meshing - Multizone + Inflation

Written by cfd.ninja

MultiZone is a sweep-based method that splits the geometry on its own. It looks for regions that can be swept and meshes those with hexahedra, leaving the awkward regions to be filled with tetrahedra or prisms. You get most of the benefits of a structured mesh without having to slice the model by hand.

Hexahedral cells pay off twice in CFD: fewer cells for the same resolution, and faces better aligned with the flow, which reduces numerical diffusion.

Combining MultiZone with inflation is the usual recipe for internal flows. MultiZone handles the bulk of the volume, and the inflation layers resolve the boundary layer along the walls, with the first layer height set from the y+ your turbulence model needs. You can work that height out with the Y+ calculator.

In this tutorial, you will learn to use the Multizone and Inflation tool using Ansys Meshing. With this tool, you can improve the mesh.

 

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