%0 Journal Article %A C. K. Chear and S. S. Dol %D 2015 %J International Journal of Mechanical and Mechatronics Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 97, 2015 %T Vehicle Aerodynamics: Drag Reduction by Surface Dimples %U https://publications.waset.org/pdf/10000829 %V 97 %X For a bluff body, dimples behave like roughness elements in stimulating a turbulent boundary layer, leading to delayed flow separation, a smaller wake and lower form drag. This is very different in principle from the application of dimples to streamlined body, where any reduction in drag would be predominantly due to a reduction in skin friction. In the present work, a car model with different dimple geometry is simulated using k-ε turbulence modeling to determine its effect to the aerodynamics performance. Overall, the results show that the application of dimples manages to reduce the drag coefficient of the car model. %P 202 - 205