Remeshing existing 2D meshes

Use the Remesh command to refine or coarsen an existing 2D mesh of linear elements. The Remesh command is helpful when you need to quickly modify a mesh for different analysis requirements. For example, in a vibro-acoustic analysis, you may want a fine mesh for the structural portion of the analysis to ensure that you capture the appropriate information. However, for the acoustic portion of the analysis, a coarser mesh may be better so that the element size is no larger than a certain fraction of the acoustic wavelength for the highest frequency of interest.

A 2D mesh of linear triangular elements with an overall element size of 10 mm.	The 2D mesh after using the Remesh command to coarsen the original mesh to a global element size of 20 mm.	The 2D mesh after using the Remesh command to refine the original mesh to a global element size of 5 mm.

The Remesh command is intended for remeshing models that do not have any associated geometry, although you can use it with meshes that are associated to the underlying geometry. Unlike other meshing commands that flatten surfaces to a 2D domain to generate the elements, the Remesh command directly generates the elements in 3D space. This direct approach is more efficient and can be faster than using other meshing commands, such as 2D Mesh.

Limitations of the Remesh command

The Remesh command is an efficient way to modify an existing 2D mesh. However, it is more limited than other meshing commands, such as 2D Mesh. For example, the Remesh command:

• Does not perform any geometry abstraction.

• Does not honor any mesh controls that you defined on the original mesh or geometry.

• Generates new meshes with linear triangular elements only.Note: If the source mesh is a linear quadrilateral mesh, then the software splits the elements using a shortest diagonal method to create a triangular mesh as the starting point for the remeshing.

• Remeshes source meshes of linear triangular or linear quadrilateral elements only.

Output from the Remesh command

The mesh that the Remesh command creates differs slightly depending on whether the original mesh is associated to the underlying geometry.

• For FE-based meshes that have no associated geometry, the software modifies the original mesh.

• For meshes that are associated to underlying geometry, the software modifies and then locks the original mesh. However, you can use the Remesh command to modify a locked mesh that you previously remeshed.If you use the Unlock command to unlock the mesh, the software marks the mesh for update. When you click the FEM Update command, the software updates the mesh using its original mesh recipe. This removes all changes made by the Remesh command.

Where do I find it?

Application	Pre/Post
Prerequisite	A FEM file as the displayed part and work partAn existing 2D mesh
Command Finder	Remesh

Learn more

Meshing

Automated meshing with selection recipes and template files

Add a custom template file to a .pax file for CAE applications

Creating Mesh Points to force node locations

Surface coat of 2D elements

Local refinement for 2D meshes

Refining a mesh using field data

Meshing for crash analysis

Edge Separation Condition

Merging meshes

Quick links

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Remeshing existing 2D meshes, Simcenter 3D 2021.1 Series

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