The major quality criteria for a hexa mesh are angle, determinant, and warpage. Refer to the Help Manual for details on the available quality measures.
> Pre-Mesh Quality Histograms 
Select Angle in the Criterion drop-down list.
Retain the default settings for Histogram Options and click .
Select the worst two bars from the histogram.
The selected bars will be highlighted in pink (Figure 58: Histogram of Angle).
Right-click in the histogram window and ensure that Show is enabled.
Disable Pre-Mesh.
> The highlighted elements are shown (Figure 59: Elements with Worst Quality). Most of the bad elements (with the worst angles) are on the block corners. This is due to the H-grid nature of the mesh within a curved geometry.
Right-click in the histogram window and select Done.
