The Finalize node () ends a meshing sequence of user-controlled type that also defines its own geometric model. It performs an associativity update for geometric entity numbers. You cannot delete, disable, or move the Finalize node.

If the setting Build automatically when leaving mesh is selected in the The Mesh Node, the software automatically builds all nodes in a meshing sequence, including the Finalize node, if you select another node in the Model Builder where the entities of the mesh are used. This typically happens when you go to the Materials node or a physics interface.

It is possible to add several meshes that define their own geometric models, that you can use to set up the geometric multigrid solver with multiple meshes. See The Mesh Node for information on how to add meshing sequences and The Geometric Multigrid Solver with Several Meshes for information about setting up the multigrid solver manually.

The Mesh node () under Meshes that has a frame around its icon defines a topology and is referred to as the component’s geometric model, or the primary sequence, on which the physics is defined. All of the other Mesh nodes should define a geometric model that is topologically similar to the one defined by the primary sequence. Two geometric models are considered to be similar if they have the same number of geometric entities and their points have the same coordinates.

When you build and finalize a nonprimary sequence, COMSOL Multiphysics first builds and finalizes the primary sequence. If the build of the primary sequence fails or if the geometric models defined by these two sequences are not similar, an error occurs.