FEM MeshGroup

From FreeCAD Documentation
Jump to navigation Jump to search
Other languages:
English • ‎français • ‎italiano • ‎русский

This documentation is not finished. Please help and contribute documentation.

GuiCommand model explains how commands should be documented. Browse Category:UnfinishedDocu to see more incomplete pages like this one. See Category:Command Reference for all commands.

See WikiPages to learn about editing the wiki pages, and go to Help FreeCAD to learn about other ways in which you can contribute.

Arrow-left.svg Previous: FEM MeshRegion.svg FEM mesh region
Next: Nodes set FEM CreateNodesSet.svg Arrow-right.svg

FEM MeshGroup.svg FEM MeshGroup

Menu location
Mesh → FEM mesh group
Workbenches
FEM
Default shortcut
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 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 FEM MeshGmshFromShape.svg FEM mesh from shape by Gmsh.
    • Select the Mesh object in the Model Tree and press the FEM MeshGroup.svg button.
    • Select the Mesh object in the Model Tree and select the Mesh → FEM MeshGroup.svg FEM mesh group option from the menu.
  2. Select whether the group is named or labelled
    • 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.
  3. Click the OK button.
  4. Close the task.
    Result: You now should see a new FEMMeshGroup object under the FEMMeshGMSH object in your active analysis container.
  5. Double-click on the FEMMeshGMSH parent object in your Model Tree and press Apply to force a mesh recalculation / relabeling.
  6. 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 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