This study is related to mixed convection heat transfer of air flowing through an ascending vertical
annular passage with significant radiation heat transfer. This configuration leads to a maximum level of heat
transfer impairment similar to the one obtained in pipe flows.
Five turbulence model predictions are compared with the experimental data obtained by the Promethée facility.
Both k–w models (Wilcox and SST) tend to overestimate heat transfer in mixed convection while the standard
low-Re number k-e underestimates it. The AKN low-Re model performs poorly in all cases. Finally, only the
v²-f model is found to closely agree with experimental data for all convection regimes.
Keywords: Journal Article;STAR-CCM+;General;Heat transfer;Turbulence;Verification and Validation;