Defining a Rule to Mesh Around 2D Holes

You can define a rule to impose nodes by distributing them around holes. Rules for holes do not apply to holes cut by a vertex.

This task shows you how to:

Before you begin: The Meshing Rules Editor or All Parameters dialog box must be open for creating or modifying a surface triangle or surface quad mesh.
See Also
Creating and Modifying Meshing Rules

Mesh Around Circular Holes

You can define a rule to mesh around circular holes by specifying the minimum and maximum diameter.

  1. Select the Feature section, and select 2D Holes as the feature type.
  2. Select Circular as the Hole type, and select Mesh around hole.
    The Mesh around hole dialog box appears.
  3. Define the holes you want considered by the rule.
    • Select Minimum diameter, and enter a value to ignore the rule for holes with a diameter less than this imposed minimum.
    • Select Maximum diameter, and enter a value to ignore the rule for holes with a diameter greater than this imposed maximum.

    If you clear a field, no threshold value is imposed for the corresponding parameter.

  4. Select a Mesh with method to specify how the number of mesh edges around holes is to be treated.
    OptionDescription
    Min. number of edges Meshes holes using at least the specified number of element edges; more edges might be added to match the surrounding mesh size.
    Exact number of edges Meshes holes with exactly the specified number of element edges.
  5. Enter a value for the exact or minimum Number of edges to be used around each hole (depending on which method you specified in the previous step).
  6. In the Layer list, select the number of layers you want to use to mesh around the holes affected by the rule.
  7. Specify the height of each layer.

    If you clear the field for a layer height, the rule mesh algorithm computes the value automatically.

  8. Specify the diameter of each layer.

  9. Click OK in the Mesh around Hole dialog box.

Mesh Around Oblong Holes

You can define a rule to mesh around oblong holes by specifying the minimum and maximum diameter and the minimum and maximum width. Oblong holes are holes that are not perfectly circular, such as an oval. Oblong holes have a length component and a width component.

  1. Select the Feature section, and select 2D Holes as the feature type.
  2. Select Oblong as the Hole type, and select Mesh around hole.
    The Mesh around hole dialog box appears.
  3. Define the holes you want considered by the rule.
    • Select Minimum diameter, and enter a value to ignore the rule for holes with a diameter less than this imposed minimum.
    • Select Maximum diameter, and enter a value to ignore the rule for holes with a diameter greater than this imposed maximum.
    • Select Minimum width, and enter a value to ignore the rule for holes with a width less than this imposed minimum.
    • Select Maximum width, and enter a value to ignore the rule for holes with a width greater than this imposed maximum.

    If you clear a field, no threshold value is imposed for the corresponding parameter.

  4. Select a Mesh with method to specify how the number of mesh edges around holes is to be treated.
    OptionDescription
    Min. number of edges Meshes holes using at least the specified number of element edges; more edges might be added to match the surrounding mesh size.
    Exact number of edges Meshes holes with exactly the specified number of element edges.
  5. Enter a value for the exact or minimum Number of edges to be used around each hole (depending on which method you specified in the previous step).
  6. In the Layer list, select the number of layers you want to use to mesh around the holes affected by the rule.



  7. Specify the height of each layer.

    If you clear the field for a layer height, the rule mesh algorithm computes a value automatically.

  8. Click OK in the Mesh around Hole dialog box.