Comment by djeastm
16 hours ago
From the article:
>This principle is fundamentally different from the effect of dimples on golf balls. Dimples reduce pressure resistance by intentionally turbulizing the airflow and suppressing backward separation. DMR, on the other hand, delays the transition, thereby suppressing not pressure resistance but the wall friction itself. They are opposite mechanisms.
mlmonkey did not say that this new observation was the same phenomenon as golf ball dimples, just golf ball dimples already disproved the "long accepted" belief that "smoother the surface, the lower the aerodynamic drag".
Exactly; golf balls are one example of it not being accepted that smooth surfaces are always best for drag, regardless of how the new result works.
They don’t though. Hit your golf ball into the cart path and see what happens after. Pro or competitive golfer will toss it and use a new ball.