Gmsh supports 2D and 3D multi-block structured and unstructured grids. Files are exported in ASCII format and in either Single or Double precision.
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.
This CAE format supports high-order export. For more information on this topic, see the Grid, Elevate section of this user manual.