COMSOL 6.4 - Copy Face

) to make a copy a boundary mesh using a rigid body transformation with a scale factor.

Figure 8-41: Copy the source mesh (yellow) to the destination faces (magenta) with Copy Face. Some boundaries are hidden for visibility.


	This operation is supported in 3D models only.


	To ensure identical meshes on periodic and symmetric boundaries, consider using the Identical Mesh attribute instead of a copy operation.


	To control the orientation of the source mesh on the destination when using the Copy Face node, right-click and add an Edge Map, One-Point Map, or Two-Point Map node as a local attribute.

Requirements:

•

Copying a mesh to a face that is adjacent to a meshed face is possible if the edges between these faces have the same number of elements as the corresponding source edges. The mesh on the destination edges is kept and the copied face elements are modified to fit with this edge mesh.

•

The edges around the source and destination faces are allowed to be partitioned differently, but only in such a way that several edges of the source face map to one edge of the destination edge, not the other way around.


	Copying a face mesh is only possible if the destination face is not adjacent to any meshed domain. The copy node overwrites any existing mesh on the destination face.

To add a node, select one or several meshed source boundaries and unmeshed destination boundaries, then choose one of the following:

•

In The Mesh Toolbar, choose from the (

) menu.

•

Right-click the node and choose from the menu.

Then enter the properties for the copy operation using the following sections:

Source and Destination Boundaries

It is possible to copy a mesh from one or several source boundaries onto one or several destination boundaries. The source (or their combination, if is used) must be a connected set of exactly the same shape as the corresponding destination, up to a constant scaling factor. More precisely, the distance between any two geometry vertices on the destination is required to be the same, up to a constant scaling factor, as the distance between the corresponding geometry vertices on the source.

Click the button to toggle between turning ON

and OFF

selections. Select the boundaries to copy the mesh from in the window.


	The source boundaries must be connected when the Single copy (all-to-one) option is specified as the Type of Copy. In an assembly, an identity pair is not sufficient to connect boundaries across parts. Instead, use the Automatic option or consider forming a union of the parts or splitting the destination boundary (using imprints, for example) so that the mesh copy is a one-to-one copy operation using two or more Copy Face nodes.

Swap Source and Destination

Click the button (

) to switch source and destination selections. Edge map is available to be switched, if provided.

Type of Copy

For settings information, see Type of Copy for the operation.

Control Entities


	This section is visible when there are mesh control entities in the geometry. See Mesh Control Operations for more information.

Use the setting to smooth the transition in element size across removed mesh control entities. Choose (default) to let the algorithm decide when to apply smoothing. If the domains adjacent to the removed mesh control entities contain tetrahedral (3D) or triangular (2D) elements only, the element size transition will be smoothed, otherwise not. Choose to always smooth the element size transition. For this option, you can specify the number of smoothing iterations in the field. In the field you can specify the maximum element depth, from the removed control entity. Choose to not smooth the element size transition.