Creating a 2D mesh inside an existing boundary

Use the Closed option in the Mesh from Boundary dialog box to create a 2D mesh within a selected set of curves or edges. You can use this command to fill holes and create a continuous mesh across a surface or a part. For example, in an acoustic analysis, you may want to remove holes that are not significant to the analysis or create a continuous, radiating surface for the acoustic calculations.

After you select the Closed method, you can use options in the Mesh from Boundary dialog box to define:

• The element edges that define the boundary of each hole that you want to fill.

• The type of elements to create and any mesh-associated data properties for those elements.

• The destination collector for the new mesh.

Selecting element edges to define the hole or set of curves

To create a mesh across a hole or within a bounded set of curves, you must select a set of element edges that define a closed loop. You can:

• Manually select individual element edges that define the hole or boundary.

• Use the Element Edge or Mesh selection filters with the Hole Element Edges smart selection option to efficiently select holes that meet specific size criteria.With the Hole Element Edges option, you can use options in the Smart Selector Options dialog box to specify criteria to control the types of holes that the software selects. For example, you can specify:The minimum and maximum hole radius values.Whether the software should include non-circular holes in the selection.Whether the software should include only holes that are currently visible in the selection.

Managing boundaries with the list

Use the Boundary List options to manage sets of element edges that define a closed boundary.

• The software lists the boundaries in descending order according to the number of nodes in each boundary. The first boundary in the list contains the fewest number of nodes.

• When you select a boundary in the list, the software highlights the loop of element edges in the Graphics window.

• Use the Remove Boundary From List option to remove selected boundaries from the list.

Example: Creating a 2D mesh within a closed boundary

The following graphics show how you can use Mesh from Boundary with the Closed option to create elements inside of both circular and non-circular holes.

A simple sheet metal part that contains several small, circular holes as well as a larger non-circular hole.	Mesh after Mesh from Boundary is used with the Hole Element Edges option to create elements inside all holes that have a radius between 1mm and 10mm.	Mesh after Mesh from Boundary is used with the Hole Element Edges option to create elements inside all holes that have a radius between 1mm and 100mm.

Where do I find it?

Application	Pre/Post
Prerequisite	A FEM or an Assembly FEM file as the work part and displayed part
Command Finder	Mesh from Boundary

Learn more

Creating a mesh inside an existing boundary

Creating a 2D mesh between a source and a target

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Creating a 2D mesh inside an existing boundary, Simcenter 3D 2021.1 Series

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