FEM MeshGroup

Description
FEM MeshGroup enables the user to create groups of Vertices, Edges, Surfaces and elements. It is useful in case of using FreeCAD as a pre-processor to export an organized and labeled mesh. The mesh is then usable by external solver codes, where mesh groups can be used more readily to set boundary conditions and general solver related properties. It is possible to use the FreeCAD mesh group object name or the label as the group name on export of the mesh. If the label is choosen the user has to take care himself if special character are used. If the mesh export format does not allow special character is it fail safe to use the mesh group object name.

FEM MeshGroup therefore enables FreeCAD to be used with external solvers (or viewers such as ParaView) when they are not yet implemented with their own case-writing routine within FreeCAD.

Usage

 * 1) To enable the function a mesh must be first provided [[Image:FEM_MeshGmshFromShape.svg|32px]] FEM mesh from shape by Gmsh.
 * 2) * Select the Mesh object in the Model Tree and press the [[Image:FEM_MeshGroup.svg|32px]] button.
 * 3) * Select the Mesh object in the Model Tree and select the option from the menu.
 * 4) Select whether the group is named or labelled
 * 5) *If "Name" is selected, the name of the MeshGroup is used when exporting the mesh.
 * 6) *If "Label" is selected, the specified label name will be used when exporting the mesh.
 * 7) Click the  button.
 * 8) Close the task.
 * Result: You now should see a new object under the  object in your active analysis container.
 * 1) Double-click on the  parent object in your Model Tree and press  to force a mesh recalculation / relabeling.
 * 2) Close the task.

After the mesh has been crated you can change the label property using the property editor. After you changed a property, you must reopen the Gmsh dialog again and click the button. (You can leave the dialog open while changing properties.)

You can create as many different mesh groups as needed.