LES Investigation of Passive Flow Control Around an Ahmed Body
Paper in proceedings, 2013

Large eddy simulations are used to study passive flow con- trol for drag reduction in a simplified ground vehicle. Add on devices in the form of short cylinders are used for the forma- tion of streaks in the streamwise direction that lead to the sep- aration delay. The results of the present numerical simulations are compared with the experimental data and show good agree- ment. The two-stage flow control mechanism is analyzed from the LES results. It was found to be in agreement with the previ- ous experimental observations that the counter-rotating vortices behind the impinging devices influence the separation only indi- rectly through the longitudinal vortices further downstream.

Ahmed body

flow control

vehicle aerodynamics


large-eddy simulation


Sinisa Krajnovic

Chalmers, Applied Mechanics, Fluid Dynamics

Proceedings of the ASME 2013 International Mechanical Engineering Congress & Exposition IMECE 2013 November 15-21, 2013, San Diego, CA, USA


Driving Forces

Sustainable development

Areas of Advance



C3SE (Chalmers Centre for Computational Science and Engineering)

Subject Categories

Fluid Mechanics and Acoustics



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