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Critical heat flux (CHF) relates the transition from nucleate boiling to film boiling. This transition leads to a significant decrease in heat transfer efficiency of the steam generator. Therefore, the accurate prediction of CHF is essential for the safe operation of the steam generator. In this study, numerical simulation of the critical heat flux for a single tube of the steam generator has been conducted. A two-fluid Eulerian-Eulerian multiphase model together with a wall heat flux model were used to obtain wall temperature variation in a tube. Different closure models have been assessed for the prediction of CHF location. The wall temperature predicted was compared to available experimental data. The results showed that as mass fluxes increase, wall temperature variation decreases. In addition to that, the CHF location was observed at 6m, which is in agreement with the experimental results.