11.5: A Day in the Life of the Boundary Layer

Better Humans Lab on Instagram: "In the early days of golf, players realized that old, beat-up balls flew further than new smooth ones. This is aerodynamics. The dimples on a golf ball create a thin layer of turbulence around the surface called a "Boundary Layer." This turbulence helps the air "stick" to the ball longer as it flies, reducing the drag wake behind it. A smooth ball would only go 130 yards; a dimpled one goes 260 yards with the exact same hit."

Boundary Layer - Basic Air Data