A numerical study for predicting the heat transfer characteristics in pulsating turbulent flow in a pipe was carried out with air as fluid. The investigation was to study the effect of variation of Reynolds number and pulsating frequency on heat transfer coefficient and Nusselt number. Henceforth, the Reynolds number was varied from 10850 to 37500 and pulsation frequency from 6.6 Hz to 70 Hz. The obtained results conclude that for a particular frequency and Reynolds number the local Nu decreased along the length of the pipe with partial fluctuations in its values. Also, at particular frequency, the mean Nu showed inconsistency with different Re. However, for frequency change from 60 Hz to 68 Hz, an increase in mean Nu was observed for most of values of Re. The results are obtained based on k − ɛ standard turbulence model and looked to be qualitatively consistent with previous investigations.