Large eddy simulations (LES) are used to study passive flow control for drag reduction in a simplified ground vehicle. Add-on devices in the form of short cylinders are used for the formation of streaks in the streamwise direction that lead to the separation delay. The results of the present numerical simulations are compared with the experimental data and show good agreement. The two-stage flow control mechanism is analyzed from the LES results. It was found to be in agreement with the previous experimental observations that the counter-rotating vortices behind the impinging devices influence the separation only indirectly through the longitudinal vortices further downstream.
Large Eddy Simulation Exploration of Passive Flow Control Around an Ahmed Body
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received August 20, 2013; final manuscript received March 9, 2014; published online September 10, 2014. Assoc. Editor: Meng Wang.
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Krajnović, S. (September 10, 2014). "Large Eddy Simulation Exploration of Passive Flow Control Around an Ahmed Body." ASME. J. Fluids Eng. December 2014; 136(12): 121103. https://doi.org/10.1115/1.4027221
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