We start by applying some global mesh settings which means that these settings will be applied to the whole mesh altogether.
Note: There have been changes to the Mesher since this video was recorded. Please see the notes under the video.
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- Automatically optimized for CFD and FLUENT, tetrahedral cells.
- Change use advanced size function to proximity and curvature. It makes it deal with curves better, lower skewness.
- Change relevance center to medium.
Skip the relevance center and proximity & curvature settings shown in this video. Your "Details of Mesh" window should look like the image below:
Local Mesh Controls
If your mesh fails when you insert a sphere of influence, skip this step. Instead, change the growth rate to 1.15 from the default of 1.2. To do this, highlight Mesh in the tree, then look under sizingSizing.
We now show you how to judge the quality of your mesh. This is an extremely important step because a bad mesh can lead to bad results!
- Skewness and orthogonal quality are the two most important. Skewness better for CFD.
- Look at the skewness mesh metric under details of mesh.
- Click on different ranges to see the specific cells in that range
In newer versions, the Mesh Metrics can be viewed under Quality instead of under Statistics:
It is generally advised to keep the minimum orthogonality greater than 0.15 and maximum skewness lower than 0.95. Having bad cells or elements can lead to incorrect simulation results. However, these are general guide rules and depend on the physics solved or where the cells are located. The following tables can help you gauge the quality of your mesh.