FEM MeshGroup

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Next: Nodes set FEM CreateNodesSet.svg Arrow-right.svg

FEM MeshGroup.svg FEM MeshGroup

Menu location
Mesh → FEM mesh group
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
FEM tutorial

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 attribute 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 chosen, the user has to be mindful if special characters are used. If the mesh export format does not allow special character its fallback is 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 FEM MeshGmshFromShape.svg FEM mesh from shape by Gmsh
  2. Then select the Mesh object in the Tree view and either
    • Press the FEM MeshGroup.svg button in the FEM toolbar
    • Select the Mesh → FEM MeshGroup.svg FEM mesh group option from the drop-down menu.
  3. Select whether the group is named or labeled
    • If Name is selected, the name of the MeshGroup is used when exporting the mesh.
    • If Label is selected, the specified label name will be used when exporting the mesh.
  4. Click the OK button.
  5. Close the task.
    Result: You now should see a new FEMMeshGroup object under the FEMMeshGMSH object in your active analysis container.
  6. Double-click on the FEMMeshGMSH parent object in your Model Tree and press Apply to force a mesh recalculation / relabeling.
  7. Close the task.

Notes

  • After the mesh has been created 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 Apply button. (You can leave the dialog open while changing properties.)
  • You can create as many different mesh groups as needed.
Arrow-left.svg Previous: FEM MeshRegion.svg FEM mesh region
Next: Nodes set FEM CreateNodesSet.svg Arrow-right.svg