Reorder Mesh

Building the Tool ReorderMesh

The tool is build when the OGS_BUILD_UTILS CMake switch is set ON. The build executable ReorderMesh is placed in the bin directory. The tool is a command line tool.

Running ReorderMesh tool will print the required arguments and a short usage message; for detailed usage add the --help argument.

> ReorderMesh --help ⏎

To reorder a bulk mesh two arguments are required:

• file name for the input mesh including bulk_node_ids and bulk_element_ids information,
• file name for the reordered mesh.

Why is the tool necessary?

In contrast to a serial simulation

for a parallel simulation

a domain decomposition is required as a preprocessing step. As you can see in the following pictures the domain decomposition (into 2 sub-domains) changes the sequence of nodes and elements. On the left the initial node and element orderings are depicted, on the right the ordering after partitioning is shown.

Simple element-wise or node-wise comparisons of simulation results are not possible. The tool ReorderMesh can be applied to reorder the nodes and elements to the initial ordering.

Typically, the workflow is as follows:

A similar workflow is implemented using snakemake for testing the ReorderMesh tool.