COMSOL 6.4 - Remesh Faces

)to modify the mesh on boundaries in 3D, as seen in Figure 8-102. Supported for mesh-based geometries and imported meshes.

Figure 8-102: Remeshing an imported STL mesh (left) using the Remesh Faces operation (right).


	This operation is available for 3D models only.

The operation also remeshes the adjacent edges which will affect the meshes on adjacent faces. If the face is adjacent to a meshed domain, also the adjacent domain mesh will be modified. Since the domain mesh will put constraints on what operations can be done on the mesh, it is typically better to first remove the domain mesh, remesh the faces, and finally mesh the domain again.


	To remove domain elements, either clear the Import domain elements checkbox in the Import operation or add a Delete Entities operation on Domain level with the Keep as unmeshed domains checkbox selected.

The attributes Corner Refinement, Distribution, and Size control the element size on boundaries and edges. Use the Fixed Mesh attribute to keep the edge mesh on adjacent edges fixed when remeshing. Use the Identical Mesh attribute to specify groups of boundaries or edges where identical mesh is needed.

To add a node, select one or several boundaries in the , then choose one of the following:

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Right-click in the window to open The Graphics Context Menu and select (

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In The Mesh Toolbar, choose from the (

) menu.

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Right-click a node, a , or a node and choose (

) from the menu.

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

Boundary Selection

Specify the boundaries that you want to remesh. Use to select all boundaries in the mesh, select to specify the boundaries by clicking in the window or selecting from the , or choose a named selection to refer to a previously defined selection.

Narrow Domain Regions

Select the checkbox (selected by default) to allow the element size to be smaller close to narrow domain regions, as shown in Figure 8-103. This option is useful if the adjacent domain will be filled with a tetrahedral mesh. Clear the checkbox to mesh each boundary without accounting for narrow domain regions. This will give a coarser mesh, as seen in the following image:

Figure 8-103: Remeshing an imported mesh using the option Resolve narrow domain regions. Turning on the option resolves the surface mesh close to the narrow region (upper right).

Elements

Select the checkbox (cleared by default) to remesh the selected faces using a quad-dominant mesh.

Face Representation

Specify which representation to use when remeshing the boundaries. The setting only affects how mesh vertices are placed on curved faces.

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Select to place new or moved mesh vertices on the input mesh. The resulting mesh will keep the shape of the input mesh to a great extent.

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Select (default) to place new or moved mesh vertices on a curved surface approximation of the input mesh. On curved faces where the mesh has been refined, the resulting mesh will typically be smoother than the input mesh.

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Creating a Computational Mesh for Imported Mesh Data

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