[Christ]

Originally Posted by Cd

If dimples really don't work, why did Audi, VW, and Lexus put them on the underside of their cars body panels ?
( Not being 'smart' with this question guys. I'm really sincere. I want to know why that they would go through all the trouble of adding them. )

Thanks

The theory was that, in addition to marketing, they would have been able to create a turbulent boundary layer on the underside of the car, which would act like a belly pan that would keep flow lower than the metal surfaces of the car's underside, essentially reducing the occurrence of under-body drag.

I dunno if it worked or not, I haven't seen any of the test data from it.

Oh - it also reduced in-cabin noise, because the thicker boundary layer acted like an insulator for noise.