Curvature Normal Angle is the maximum allowable angle that one element edge is allowed to span given a particular geometry curvature. This option is available only when is set to Yes. You can specify a value from 0 to 180 degrees or accept the default. (A value of 0 resets the option to its default.) The default value depends on the Physics Preference selected.
You can use the Curvature Normal Angle to limit the number of elements that are generated along a curve or surface if the Curvature Min Size is too small for that particular curve.
Example 2: How the Curvature Normal Angle Controls Element Placement
The following figure shows a curved region with a Curvature Normal Angle of α = 45o. If the curvature were extended to 360o to create a circle, the Curvature Normal Angle is the arc span from the center of the circle to the curved region. Three arc spans are needed to span the entire curvature, which results in three elements placed along the curvature: one in each arc span.
