Edge supports 2D and 3D unstructured grids only. All currently supported
cell types are exported. The grid, boundary condition, and volume condition
data is exported to a filename.bmsh file written in Single precision
and Unformatted file format.
Caution: The presence of pole connectors and pole domains in structured blocks can result in degenerate hexahedral cells when exporting to an unstructured CAE format. Please refer to the Collapsed Cell Types section of this User Manual for more information on which structured topologies result in unsupported cell types.