Ansys Meshing - Fine Mesh
Written by cfd.ninja
A fine mesh is not automatically a good mesh. What decides the accuracy is whether the cells are where the gradients are, and whether their shape lets the solver work.
Three metrics tell you most of it. Skewness measures how far a cell has departed from its ideal shape, orthogonal quality how well the face normals line up with the vectors joining the cell centres, and aspect ratio how stretched a cell is. Stretched cells are fine inside a boundary layer, where the flow changes in one direction only, and harmful in a region where it changes in all of them.
Refining uniformly multiplies the cost without improving the answer much. The cells earn their keep near walls, in wakes and around small features, with the first inflation layer sized from your target y+, which the Y+ calculator will give you.
In this first tutorial, you will learn to generate a fine mesh of a geometry using Ansys Meshing.
Ansys Meshing – Inflation
In this tutorial, you will learn to use the Inflation tool in Ansys Meshing to control the boundary layer mesh near walls for more accurate CFD simulations.
Ansys Meshing – Multizone + Inflation
In this tutorial, you will learn to use the Multizone and Inflation tool using Ansys Meshing.
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