Trelis 16.5 User Documentation

The **Curvature** sizing function determines element size
based on the curvature evaluation of a surface at the current location.
Two surface curvature values (taken perpendicular to each other) are compared
at the location of interest, and the largest is used as the sizing function
for the mesh. Figure 1 shows a solid with a highly deformed surface which
displays rapid change of surface curvature at several locations.

Figure 2 depicts a normal paved mesh of this surface using a common size on all bounding curves and no sizing function in the interior. The total number of quadrilateral shell elements for this case is 1988. Figure 3 shows a mesh which was generated with the curvature sizing function option. The mesh is graded denser in the regions of quickly changing curvature, such as at the tops of the hills and at the bottom of the valley. Due to the intense interrogation of the underlying geometric modeler which the curvature method relies on, this option can be very computationally expensive.