CFX’s * .def file or * .res file can be loaded as a mesh in Fluent through File ->Import->CFX. Select Definition File … for * .def file or Result File … for * .res file. After the mesh is read, do Grid->check. Analysis results of CFX are in the CGNS format. In CFX, Solver of Tools->Export Result can export in CGNS format. In Fluent, File->Import->CGNS->Data will allow the data to be read. However, data of multiphase flow is incompatible) Note: There is no Import function for the settings and parameters of the boundary conditions. These will have to be set manually.