Corner Refinement

) to decrease the element size at sharp corners. The node considers a vertex in 2D or an edge in 3D to be a sharp corner if the angle between the adjacent selected boundaries, with respect to the selected domain, is greater than a specified angle, as shown to the right in Figure 8-40.

Figure 8-40: The default tetrahedral mesh for this backstep geometry (left). The image to the right shows how the tetrahedral mesh is refined close to the sharp corner when a Corner Refinement node has been added.

To refine the mesh in sharp corners:

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Right-click a mesh operation and choose to add it as a local attribute.

To add it as a global node in the meshing sequence:

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In The Mesh Toolbar, choose from the (

) menu.

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Right-click the node and choose .


	Global vs. Local Attributes


	If there are several Corner Refinement nodes in the sequence with a nonempty selection intersection, the mesh generator uses properties corresponding to the last Corner Refinement node in the sequence.

Then enter the properties using the following sections:

Domain Selection

Specify the domains for which the node determines if the specified corners are sharp. Choose the level of the geometry from the list:

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Choose to specify that the node should determine sharp corners with respect to all domains. The corner refinement also considers corners not adjacent to any domain.

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Choose to specify the domains for which you want to determine sharp corners. Choose in the list to select the domains in the window, choose a named selection to refer to a previously defined selection, or choose to select all domains.

By default, Domain Selections are (the button is ON).

Boundary Selection

To specify the boundaries, click the button to turn it ON and select the boundaries in the window for which the corner refinement should determine the sharp corners. When the boundary selection is , the section button is automatically turned OFF.

Angle

Use the field to specify the minimum angle between a pair of adjacent boundaries in the boundary selection for the refinement factor to apply at the vertex in 2D and edge(s) in 3D between the two boundaries. If a boundary pair is adjacent to one domain on each side (interior boundary) the corner refinement determines the angle(s) on the side(s) corresponding to the specified domain(s).

Refinement

Use the field to specify a refinement factor (<1) that scales the element size for the vertices in 2D and edges in 3D corresponding to the sharp corners.