Version: 6.5.0
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Splitting volumes into tetrahedra


This operation allows to split volumic elements into tetrahedra. 2D mesh is modified accordingly.

To split volumes:

  1. Display a mesh or a submesh in the 3D viewer.
  2. In the Modification menu select the Split into Tetrahedra item or click "Split into Tetrahedra" button in the toolbar.

    split_into_tetra_icon.png
    "Split into Tetrahedra" button

    The following dialog box will appear:

    split_into_tetra.png
    • The main list contains the list of volumes. You can click on a volume in the 3D viewer and it will be highlighted (lock Shift keyboard button to select several volumes). Click Add button and the ID of this volume will be added to the list. To remove the selected element or elements from the list click Remove button. Sort list button allows to sort the list of IDs. Filter button allows to apply a definite filter to the selection of volumes.
      Note: If you split not all adjacent non-tetrahedral volumes, your mesh becomes non-conform.
    • Apply to all radio button allows to split all volumes of the currently displayed mesh or submesh.
    • Split hexahedron

      • Into 5 tetrahedra, Into 6 tetrahedra and Into 24 tetrahedra allows to specify the number of tetrahedra a hexahedron will be split into. If the specified method does not allow to get a conform mesh, a generic solution is applied: an additional node is created at the gravity center of a hexahedron, serving an apex of tetrahedra, all quadrangle sides of the hexahedron are split into two triangles each serving a base of a new tetrahedron.

    • Select from a set of fields allows to choose a submesh or an existing group whose elements will be automatically added to the list.

  3. Click the Apply or Apply and Close button to confirm the operation.
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