As a general rule, it is easier to construct a mesh with smaller elements than a mesh with larger elements. If you get errors or low-quality elements when you try to mesh certain domains, try to decrease the element size using appropriate Size attributes on these domains. See Editing and Resetting a Physics-Controlled Sequence and Controlling the Mesh Size Using Attributes for more information.

If your geometry contains details that are very small compared to the total volume of the mesh, you must ensure that the Minimum element size parameter in the corresponding Size attribute is of the same order of magnitude as the smallest detail you want to resolve. If this parameter is too large, you get Information nodes when building the node. For example, the Information message “Edge is much shorter than the specified minimum element size” indicates that there are edges significantly shorter than the specified minimum element size. The resulting mesh gets badly shaped elements.

Sometimes, the geometry contains small features, like sliver faces and short edges, which you do not want to resolve at all. Use Virtual Geometry Operations in the sequence to remove unwanted details in the geometry. See the section Preparing the Geometry for Meshing Using Remove Details for more information.

If you have a license for the CAD Import Module, you can also use CAD defeaturing operations to simplify the geometry. See Repairing and Defeaturing for more information.

If the geometry includes complex domains or complex faces that you have trouble meshing, you can try to partition the geometry into less complex entities. On a philosophical level, this method could be classified as a “divide and conquer” strategy. It is often possible to use the Partition Objects geometry feature to partition a complex domain into two domains. You can use a Mesh Control Faces node to make this partitioning visible only when building the mesh (see Controlling the Mesh Size Using Mesh Control Entities).