HMCFD-T: 1010 Enclosure Workflow

Before you begin, copy the file(s) used in this tutorial to your working directory.

Group the Solids to be Enclosed

  1. Open the PowerTrain_Model_Defeaturing.hm file.
  2. Make sure the entity selector in the modeling window is set to Parts.
  3. While holding the Ctrl key, select the solids depicted in the figure below.


    Figure 1.
  4. From the Assembly ribbon, click the Group tool.


    Figure 2.
  5. Make sure that you have 7 parts selected by observing the number in parentheses on the guide bar selector.


    Figure 3.
  6. On the guide bar, click to execute the command and remain in the tool.


    Figure 4.
  7. In the Groups legend, rename the Parts Group to For_Wrapping.
  8. Right-click For_Wrapping and select Isolate.
    This displays only the parts that will be enclosed.
  9. On the guide bar, click to exit the tool.
  10. Save the model.

Convert CAD Geometry to an FE (Tessellated) Model

  1. From the Home tools, click the Convert tool.


    Figure 5.
    The Convert CAD to FE dialog opens.
  2. Select FeGeometry as the type to convert to.
  3. Ensure that Faceting is selected for the Unmeshed surface meshing method and that the faceting size definition is set to Normal.


    Figure 6.
  4. Click Convert.
  5. Press Esc to exit the tool.
  6. Save the model.

Cap Holes and Other Openings

Small holes and other openings which only increase the mesh count and do not contribute to the simulation are capped/closed off before the enclosure of the geometry is done.

  1. Ensure that you have only the parts belonging to the "For_Wrapping" group displayed on the screen. If not, click the Group tool, right-click on For_Wrapping in the legend, and select Isolate.
  2. From the Discrete ribbon, click the Cap > Holes tool.


    Figure 7.
  3. Enter a value of 40 for the Maximum Width.
  4. Select all surfaces on the screen using one of the following methods:
    • Left-click and drag over the entire model.
    • Press Ctrl + A.
    Ensure that you have 2925 surfaces displayed on the guide bar's surface selector.


    Figure 8.
  5. Click Cap to begin the capping process.
  6. Change the guide bar selector from Surfaces to Nodes.
  7. Select the four nodes shown in Figure 9.


    Figure 9.
  8. Click Cap to begin the capping process.
  9. Click the Enclosure > Adaptive Wrap tool.


    Figure 10.
  10. In the dialog, set the wrapping method to Tight Wrap, enter the value of 20 for the Average element size, and leave all other options as their default values.


    Figure 11.
  11. Select all Parts on the screen.
  12. Click Run to execute the wrapping operation.
  13. Press Esc to exit the tool.
  14. Save the model.

Re-mesh Enclosed Results

  1. From the Discrete ribbon, click the Remesh tool.


    Figure 12.
  2. Select all surfaces on the screen.
  3. In the dialog, set the Average size to 20 and leave all other options as their default values.


    Figure 13.
  4. Click Mesh on the guide bar to execute the re-mesh operation.
  5. Press Esc to exit the tool.
  6. Save the model.

Fix Enclosed Geometry

  1. From the Discrete ribbon, click the Auto Repair tool.
    Figure 14.
  2. Select all parts on the screen.
  3. Click on the guide bar. Ensure that Intersection cleanup is checked.


    Figure 15.
  4. Click Fix to initiate the repair of the wrapped surface model.
  5. Press Esc to exit the tool.
  6. Save the model.


    Figure 16.