Bounding volume mesh controls

Use the Bounding Volume density type to control the size of elements that are generated within the domain of a bounding volume selection recipe. With this type of mesh control, the software applies the desired element size to the elements that lie within or intersect the bounding volume. You can use bounding volume selection recipes that you create with the following methods to define a Bounding Volume mesh control:

• Box

• Sphere

• Cylinder

Note:

The software prevents you from creating a Bounding Volume mesh control using a bounding volume selection recipe method that is not supported, such as Arbitrary Volume or with any bounding volume selection recipe created with an infinite dimension, such as a cylinder with an infinite extrusion depth.

To define a bounding volume, use the Bounding Volume option in the Selection Recipe dialog box. For more information, see Selection recipes and Create a selection recipe using a bounding volume.

Mesh types and requirements

You can use Bounding Volume mesh controls to locally control the size of elements in 2D triangular meshes, 3D tetrahedral meshes, and immersed boundary meshes.

Each meshing command has different requirements for Bounding Volume selection recipes and mesh controls.

With the 3D Tetrahedral Mesh and 3D Hybrid Mesh commands:

• When you create the Bounding Volume selection recipe:Select the Inside/Crossing option in the Containment group.Select appropriate entity type or types, such as Node, Element, or Polygon Body, from the Entity Types list.

• When you create the Bounding Volume mesh control, select the polygon body or bodies that you want to associate with the mesh control.

With the Solid from Shell and 3D Hybrid from Shell Mesh commands, there are no special requirements for creating the Bounding Volume selection recipe. Use the Bounding Volume Density Mesh Control option to select the appropriate Bounding Volume mesh control.

As a best practice with the 3D Tetrahedral Mesh and Solid from Shell commands, all bounding volume recipes that you create should lie completely within the associated polygon body. If the bounding volume crosses or lies close to the boundary of the polygon body, you can use a Bounding Volume mesh control together with a Point mesh control. Use Bounding Volume mesh control to affect the density of the solid mesh and the Point mesh control to affect the density of the surface mesh.

When you use the 3D Immersed Boundary Mesh command to create the bounding volume density that is applied to the immersed boundary mesh, you must not select polygon bodies. You can only select the box, cylinder, or sphere bounding volume definition method to define the bounding volume selection recipe.

Note:

When you create meshes with the 3D Swept Mesh command, the software does not recognize the Bounding Volume mesh controls.

Where do I find it?

Application	Pre/Post
Prerequisite	A FEM file as the work part and displayed part
Command Finder	Mesh Control
Menu	Insert→Mesh→Mesh Control

Learn more

Controlling local mesh density (Mesh Controls)

Mesh control definitions

Number and Size on Edge mesh controls

Chordal Tolerance on Edge mesh controls

Biasing on Edge mesh controls

Size on Face mesh controls

Weld Row mesh controls

Mapped Hole mesh controls

Fillet mesh controls

Cylinder mesh controls

Point mesh controls

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

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Bounding volume mesh controls, Simcenter 3D 2021.1 Series

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