Delete Entities
Use a Delete Entities node () to delete geometric entities from an imported mesh.
To delete geometric entities:
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Right-click in the Graphics window to open up The Graphics Context Menu and select Delete Entities ().
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Right-click Mesh node and select Delete Entities ().
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Click Delete Entities () on the Mesh Ribbon.
Note that deleting entities modifies the number of geometric entities in the mesh. Thus when you are adding this operation to a meshing sequence that is conforming with the component's geometry, a new meshing sequence that is defining its own geometric model is automatically created, and the Delete Entities node is added to this new sequence. For more information see The Mesh Node.
Enter the properties for the Delete Entities node using the following sections:
Geometric Entity Selection
Define the geometric entities that you want to delete. You choose the geometric entity level from the Geometric entity level list: Choose Domain, Boundary, Edge, or Point to specify the domains, boundaries, edges, or vertices, respectively, that you want to delete. Use All domains, All boundaries, All edges, or All points to select all entities of the specified dimension.
Keep as Unmeshed Domains
In 3D, when Geometric entity level is set to Domain, select Keep as unmeshed domains (cleared by default) to only delete the domain elements while keeping the domains as unmeshed as well as keeping the adjacent meshed boundaries. Use the Free Tetrahedral operation to fill any unmeshed domain with tetrahedral elements.
Adjacent Entities
Select the Delete adjacent lower-dimensional entities check box to also delete the adjacent entities of lower space dimensions.
See STL Import 2 — Remeshing an Imported Mesh: Application Library path COMSOL_Multiphysics/Meshing_Tutorials/stl_vertebra_mesh_import.
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Free Tetrahedral
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Join Entities
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Intersect with Plane