Assessment of Common Turbulence Models under Conditions of Temporal Acceleration in a Pipe

作者：Khaleghi A^*; Pasandideh Fard M; Malek Jafarian M; Chung Y M

来源：Journal of Applied Fluid Mechanics, 2010, 3(1): 25-33.

• Turbulence model
• Pipe flow
• Unsteady
• DNS
• URANS

In this paper, transient flow in a pipe at Reynolds numbers (based on bulk velocity and diameter) ranged from 7000 to 45200 is numerically simulated using four common turbulence models. The models considered are the Baldwin-Lomax algebraic model, the kappa-epsilon model with wall correction of Lam and Bremhorst, the kappa-omega model and the kappa-epsilon-nu(2) model of Durbin. The results of these models are compared with those of the recent experiments reported in the literature. The predicted velocity and delay period using the models compared well with measured values for short and long ramp-up flow excursions. The delay period of the calculated turbulence kinetic energy close to the pipe centerline is around 4 sec which agrees with the experiments. The kappa-omega-nu(2) model was found to provide the best results compared to the measured data in the region away from the wall. At the end of the excursion near the wall, however, the results of this model differs from those of the experiments.

• 出版日期2010-1