Numerical study of a kinetic detachment flow in the near-wake of an ahmed body
Résumé
To understand the impact of vehicle on the air pollution, it this significant to modelling a flow around it. For that we use a simplified car model Ahmed body. Numerical analysis was performed for a turbulent flow around an Ahmed body. A strong vortex structure in the near–wake could have a large significance on the atmospheric
prediction, even on the power of a car. The turbulent model has been applied a standard κ–ε two equations model and the two–dimensional Reynolds Averaged Navier–Stokes (RANS) equations, are discredited with the second order upwind scheme. The SIMPLE algorithm, which is developed using control volumes, is adopted as the numerical procedure. Calculations were performed for different slopes of Ahmed body’s rear window. The results reveal that, the takeoff zone is function to the rate of the flow. It is more prolonged upstream of the Ahmed body and less intense for 5 m/s and 40 m/s speeds. And more prolonged to the top and less intense for 25 m/s for the various slopes. Comparison of numerical results with the experimental plot available in the
literature is satisfactory
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Licence : CC BY - Paternité
Licence : CC BY - Paternité