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golfball dimples explained
Posted: Wed Dec 10, 2008 12:42 am
by jmeyer1022
http://www.livescience.com/common/media ... ?aid=24295
voice is annoying, but good insight on why its most effective projectile
Posted: Wed Dec 10, 2008 1:17 am
by starman
It looked like air turbulance actually "surfed" over the dimple, effectively cutting down the golfball surface area that came in contact with the "moving" air.
It also looks like the well of air in the dimple provides a bearing of sorts between the ball the air it's moving through...sort of like the air that rides in the back of a pickup truck.
Interesting analysis there.
Posted: Wed Dec 10, 2008 1:29 am
by Daltonultra
Looks like simple boundary layer turbulence. Same effect as shark-skin in water, or the brushed finish inside properly polished car intakes.
Posted: Mon Dec 15, 2008 2:51 am
by raptorforce
so basically you could make dimples in your projectile and it would be more aerodynamic
Posted: Mon Dec 15, 2008 4:15 am
by ALIHISGREAT
raptorforce wrote:so basically you could make dimples in your projectile and it would be more aerodynamic
i wouldn't have thought so, if its already reasonably aerodynamic, i see no reason to include dimples? otherwise we would have a lot more dimpled objects flying around.
Posted: Mon Dec 15, 2008 8:31 pm
by D_Hall
Dimples induce turbulence. NORMALLY, turbulence is a bad thing. HOwever, in a narrow band of Reynold's numbers, turbulence does decrease drag.... As luck would have it, golf balls fly in that band.
Posted: Tue Dec 16, 2008 1:10 am
by raptorforce
D_Hall wrote:Dimples induce turbulence. NORMALLY, turbulence is a bad thing. HOwever, in a narrow band of Reynold's numbers, turbulence does decrease drag.... As luck would have it, golf balls fly in that band.
so basically everything except golfballs should have dimples because dimples only work on golfballs is that correct
got finals this week =(