2D Boundary Layer Minimum Aspect Ratio Flag

2D Boundary layer minimum aspect ratio flag sets the length-to-height target aspect ratio value.

This is the same as Boundary layer minimum aspect ratio flag but is used only for 2D boundary layers. The default 2D boundary layer minimum aspect ratio is set to 0.9 (width is 90 percent of the height). Setting a value of zero effectively disables the control since all valid elements have an aspect ratio > 0.