reason for dimples in golf ball?

its true that dimples give xtra drag to the ball due to aerodynamic flow of air the ball ityself gets a rotational motion due to the dimples... which alters the aero flow when in air............

also it reduces the efect of wind on the ball to al large xtent......

The dimples on a golf ball are extremely important and very complicated stuff. Basically provides the sphere with a less and more constant drag coefficient then that of a smooth sphere. The drag caused by friction, but more importantly the drag is caused by the separation of the air flow behind the ball, known as a pressure drag. On a smooth sphere laminar flow separates very easily. However on a sphere with dimples the turbulent flow doesn't separate so easily and is delayed.

The turbulent flow has more energy than the laminar flow and thus, the flow stays attached longer. Dimples cause the Reynolds number to decrease thus the flow becomes more turbulent at a lower velocity then a smooth sphere. This causes the flow to remain attached longer on a dimpled sphere then a smooth sphere which reduces the drag.

Dimples help the air flow around the golf ball better so it flies farther. Instead of just having the wind bounce off a round ball, it gets into the grooves of a golf ball and actually propels said ball further. It's good for about 20-30 yards of distance if you hit the crap out of the ball.

Hi,

I am telling about Number of Golf Ball Dimples ???????????????

Most balls on sale today have about 300 to 450 dimples.

There were a few balls having over 500 dimples before. The record holder was a ball with 1,070 dimples -- 414 larger ones (in four different sizes) and 656 pinhead-sized ones. All brands of balls, except one, have even-numbered dimples. The only odd-numbered ball on market is a ball with 333 dimples.

I know a site which helps you better information about the dimples in GOLF ball.

Thanks

The answer to this question can be found by looking at the aerodynamic drag on a sphere. There are two types of drag experienced by a sphere. The first is the obvious drag due to friction. This only accounts for a small part of the drag experienced by a ball. The majority of the drag comes from the separation of the flow behind the ball and is known as pressure drag due to separation. For laminar flow past a sphere, the flow separates very early as shown in Figure 1. However, for a turbulent flow, separation is delayed as can be seen in Figure 2. Notice the difference in the size of the separation region behind the spheres. The separation region in the turbulent case is much smaller than in the laminar case. The larger separation region of the laminar case implies a larger pressure drag on the sphere. This is why the professor experienced a longer drive with the marked ball. The surface roughness caused the flow to transition from laminar to turbulent. The turbulent flow has more energy than the laminar flow and thus, the flow stays attached longer.

The dimples, paradoxically, do increase drag slightly. But they also increase "Magnus lift", that peculiar lifting force experienced by rotating bodies travelling through a medium. Magnus lift is present because a driven golf ball has backspin. The same Magnus effect can cause a ball to hook or slice if it has sideways spin.

so that it can fly further.. ball with smooth surface wont fly as far as the dimples one.. it's in Mythbuster! :D

It would be much easier to do a search in YA on this question

http://answers.yahoo.com/question/index;_ylt=ApvN1...