Dimples and drag, yet again.....

[Tesla]

Just stumbled on this little article, can't see any particular application, but was interesting how thay were using it on rims for racing cycles and how the angular geometric dimples perform better and it may be the corners that give the main benefit.

Can dimpled aerodynamic surfaces reduce drag? | Racecar Engineering

[gone-ot]

If they (dimples) work for whales, why not on cars!?!

[Tesla]

Originally Posted by Old Tele man

If they (dimples) work for whales, why not on cars!?!

Nature has much stricter manufacturing criteria i.e. inappropriate design = extinction.

I think some of the discussion regarding the design of tyres & rims highlighted some of the problems, if the rim/tyre boundary causes seperation, then the dimpled wheel doesn't come into play at all, but if flow remains attached, then the benefits are revealed.