The SBES turbulence model is available in both Fluent and CFX. Transitional Turbulence model may be turned on in CFX and could be used in addition to the SBES model in CFX. The Transitional Turbulence models predict transition to turbulence using empirical correlations. Please refer to "4.1.11. Ansys CFX Laminar-Turbulent Transition Models" in the CFX Modeling Guide for further details.