Quote:
Originally Posted by jyl
I think there are two different effects that dimples can have. ...
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Yeah, you
can see it that way, but that would be like seeing gravity as acting sideways - as in; a soapy bathtub makes gravity pull your feet sideways.--as a second gravity that acts only on feet, and only sideways.
Anyway, my point was about looking at the varying velocity, and that the physics of dimples (surface roughness) are non-linear wrt velocity.
SOmewhere, decades ago, I saw the chart specifically for golfballs, but this will do.
And on that
two thing...
Edit: diagrams credit to Roberson /Crowe (Crowe was one of my fluid dynamics profs)