The Target Element Quality global option allows you to set a target Element Quality that you would like the mesh to satisfy.
The Target Element Quality value drives improvements to tetrahedral elements. If you set the target quality and the mesh contains tetrahedral elements, the mesher will attempt to improve the tetrahedral elements to meet the target quality that you specified. If the target quality cannot be met, a valid mesh may still be generated. In addition, if Check Mesh Quality is set to Yes, Errors and Warnings, a warning message is displayed to help you address the issues preventing the mesh from satisfying the target quality. You can right-click the Message field and select the Show Elements option from the context menu to create Named Selections for the elements that don't meet the target.
You should set the target quality if you intend to run a simulation that is sensitive to mesh quality. However, because setting the target quality increases memory usage and the time required to generate the mesh, you should not set the quality any higher than necessary.
To set the Target Element Quality, enter a value between 0 (lower quality) and 1 (higher quality). The default is 0.05.
Note:
Target Element Quality is supported for the Patch Conforming Tetra mesh method only.
The Adaptive sizing can result in coarse mesh sizes with stretched elements that cannot be improved with a higher target quality value. Therefore, if you are using the Adaptive sizing, you should set the Target Element Quality to a value < 0.1. Alternatively, you could use a different sizing option (such as Curvature).