Ansys has released the latest version of its computational fluid dynamics (CFD) software, Fluent 6.3. A pressure- based coupled solver joins the existing solver options and improves solution efficiency as well as convergence and robustness for many cases. Polyhedral meshes, new in Fluent 6.3 software, allow the flexibility of an unstructured mesh to be applied to complex geometries without the overhead associated with a large tetrahedral mesh. The automatic nature of the techniques used to create polyhedral meshes saves the user time, and, since a polyhedral mesh contains many fewer cells than the corresponding tetrahedral mesh, convergence is faster. It is also easier to import and export files to and from other analysis tools - for fluid structure interaction, for example.