Abstract
Simulation of transition for internal flow is a desirable work for engineering application. We tried to modify SST transition model for transition prediction of internal flow by adjusting the source term of transport equation for transition onset momentum thickness Reynolds number. As the first step towards this goal, a constant Reynolds number of transition onset was employed. The value was selected by a sensitive study. The modified model was applied to calculate 3D steady and pulsating forced convection heat transfer in a mini-rectangular channel. Comparison with the experimental result shows that the model can successfully predict the trend of steady friction factor, Nusselt number, the amplitude of wall and fluid temperature fluctuation. The fluctuation amplitude of wall temperature decreased first and then increased, but finally decreased again as observed both in simulation and experiment. However, as a result of too big Reynolds number of transition onset we chose, the critical Reynolds number predicted by simulation is bigger than that obtained by the experiment. The value of above mentioned parameters also deviated from experimental data. Further improvement is needed.
