Geometry Preparation


SimModeler has advanced capabilities that help the user prepare the geometry for analysis. Models may be both simplifed and augmented to transform the original CAD geometry into appropriate simulation geometry. Small geometric features can be eliminated (greatly improving mesh quality).

There are a variety of tools that operate directly on discrete geometry (mesh-based geometry from STL or other sources). Tools are available to detect issues with the mesh and perform local and global improvement and repair operations. Full boolean capabilities are available to union individual parts.


  • Remove features from the model
  • Add far field regions for flow analysis
  • Split model faces for meshing or solver analysis application
  • Delete parts from assemblies, model entities from parts
  • Project model edges onto model faces
  • Move features

Auto-Detection of Features for Removal


In the above image, the top and bottom faces of the block are selected in blue (A).

Auto-detection is then used to find connected sets of faces between these two faces (B). Note that it finds the conical pockets as well as those faces with connectivity to both the top and bottom.

Since the auto-detection is returned in sets, it is then easy to deselect the outer faces of the box (C).

The rest of the features are removed together (D).

Add Isoline


By splitting the leading edge of the airfoil wing, advanced meshing attributes (in this case 2D boundary layers) can be added.

On left, the original model face and subsequent mesh. On right, the model face as it is being split and the resultant mesh using 2D boundary layers.

Delete Features


With the delete features tool, geometry can be simplified for suppression. In the top example, various cutouts are removed. In the bottom example, sharp tangent features are squared off.

Offset Faces


The offset faces tool can be used to add material (top) or remove material (bottom).