When in meshing mode, Fluent:
Functions as a robust, unstructured volume mesh generator
Generates volume meshes that can be transferred to solution mode in Fluent
Uses the Delaunay triangulation method for tetrahedra
Uses the advancing layer method for prisms
Generates hexcore mesh
Has a robust surface wrapper tool
Includes size functions that can produce ideal size distributions for many CFD calculations
Can directly create a hex-dominant mesh on faceted geometry (using the CutCell mesher)
Can export polyhedral cells
Has tools for checking, repairing, and improving boundary mesh to ensure a good starting point for the volume mesh
Can manipulate face/cell zones
Is flexible—it allows the most appropriate cell type to be used to generate the volume mesh:
Tet meshes are suitable for complex geometries.
Hexcore meshes can combine the flexibility of tet, hex, and prism meshes with a smaller cell count and higher hex-to-tet ratio.
CutCell (hex-dominant) meshes can be directly created from faceted geometry and can also be combined with prism layers.
The Rapid Octree mesher directly operates on faceted geometry and offers a fast and robust meshing capability on high core counts.
Has hybrid meshes:
Prism layers near walls allow proper boundary layer resolution.
Allows flow alignments with mesh lines.
Generates smaller volume mesh with highly stretched prismatic elements.
Has non-conformal meshes:
Suitable for studies involving selective replacement of parts.
Meshes generated separately can be glued together.