Comparative study of turbulence model predictions of upward supercritical fluid flow in vertical rod bundle subchannels

The k-epsilon turbulence model, implemented using CFX and Scalable Wall Functions, provided the numerical results that have the smallest overall deviation from experimental results for three of the six cases, and predicted the experimental data of the remaining four cases reasonably well, unlike other turbulence models that sometimes severely over-predict the experimental data for wall surface temperature.