Overall element size level for meshing. The level value controls the fineness of the mesh. (Any input in this field causes remaining arguments to be ignored.) Valid inputs are:

Scaling factor applied to the computed default mesh sizing. Defaults to 1 for h-elements (size level 6), which is medium. Values from 0.2 to 5.0 are allowed.

Mesh expansion (or contraction) factor. (This factor is the same as MOPT,EXPND,Value.) EXPND is used to size internal elements in an area based on the size of the elements on the area's boundaries. For example, issuing SMRTSIZE,,,2 before meshing an area will allow a mesh with elements that are approximately twice as large in the interior of an area as they are on the boundary. If EXPND is less than 1, a mesh with smaller elements on the interior of the area will be allowed. EXPND should be greater than 0.5 but less than 4. EXPND defaults to 1 for h-elements (size level 6), which does not allow expansion or contraction of internal element sizes (except when using AESIZE element sizing). (If EXPND is set to zero, the default value of 1 will be used.) The actual size of the internal elements will also depend on the TRANS option or upon AESIZE or ESIZE sizing, if used.

Mesh transition factor. (This factor is the same as MOPT,TRANS,Value.) TRANS is used to control how rapidly elements are permitted to change in size from the boundary to the interior of an area. TRANS defaults to 2.0 for h-elements (size level 6), which permits elements to approximately double in size from one element to the next as they approach the interior of the area. (If TRANS is set to zero, the default value will be used.) TRANS must be greater than 1 and, for best results, should be less than 4. The actual size of the internal elements will also depend on the EXPND option or upon AESIZE or ESIZE sizing, if used.

Maximum spanned angle per lower-order element for curved lines. Defaults to 22.5 degrees per element (size level 6). This angle limit may be exceeded if the mesher encounters a small feature (hole, fillet, etc.). (This value is not the same as that set by DESIZE,,,,ANGL.)

Maximum spanned angle per higher-order element for curved lines. Defaults to 30 degrees per element (size level 6). This angle limit may be exceeded if the mesher encounters a small feature (hole, fillet, etc.). (This value is NOT the same as that set by DESIZE,,,,,ANGH.)

Allowable growth ratio used for proximity checking. Defaults to 1.5 for h-elements (size level 6). Values from 1.2 to 5.0 are allowed; however, values from 1.5 to 2.0 are recommended.

Small hole coarsening key, can be ON (default for size level 6) or OFF. If ON, this feature suppresses curvature refinement that would result in very small element edges (i.e., refinement around small features).

Small angle coarsening key, can be ON (default for all levels) or OFF. If ON, this feature restricts proximity refinement in areas where it is ill-advised (that is, in tight corners on areas, especially those that approach 0 degrees).

Maximum number of sizing iterations (defaults to 4 for all levels).

Surface proximity refinement key, can be off (SPRX = 0, which is the default for all levels) or on via two different values (SPRX = 1 or SPRX = 2). If SPRX = 1, surface proximity refinement is performed and any shell elements that need to be modified are modified. If SPRX=2, surface proximity refinement is performed but no shell elements are altered.