Splitting Quadrangles

This task shows you how to improve the element quality by splitting the quadrangles both in the Surface Mesher workshop and in the Advanced Surface Mesher workshop.

• Open the Sample01_1.CATAnalysis document from the samples directory.

• Enter the Surface Mesher workshop or the Advanced Surface Mesher workshop.
  For more details, refer to Entering the Surface Mesher Workshop or Entering the Advanced Surface Meser Workshop.
  In this particular example, enter the Advanced Surface Mesher workshop.

• Mesh the surface.
  For more details, refer to Launching the Mesh Execution in the:

  • Surface Mesher workshop,

  • Advanced Surface Mesher workshop.

1. Click Split Quadrangles in the Edition Tools toolbar to activate the split quadrangles mode.

   The Split Quadrangles dialog box appears: Element quality: lets you specify the elements to split depending on their quality. You can choose Bad, Bad and poor, Poor and All elements qualities Element selection: lets you specify the elements to split depending on their location using the trap type elements selection method Do not use Element Selection parameter if you want to perform the split quadrangles functionality on all the mesh part. You have only to click on it.

2. Select Bad as Element quality option and click the mesh part.

   Bad quality elements are split, if necessary, in order to improve their quality as shown below:

3. Click Undo in the Standard toolbar to undo your modifications, select Poor as Element quality option and click the mesh part.

   Poor quality elements are split, if necessary, in order to improve their quality as shown below:

4. Click Undo to undo your modifications, select Bad and poor as Element quality option and click the mesh part.

   Bad and poor quality elements are split, if necessary, in order to improve their quality as shown below:

5. Click Undo to undo your modifications, select All as Element quality option and click the mesh part.

   All quality elements are split, if necessary,  in order to improve their quality as shown below:

6. Click OK in the Split quadrangles dialog box to deactivate the split quadrangles mode.

Note that each selected element is split only if it will improve the mesh quality.