Dimples on a golf ball have a great effect on drag-coefficient. Depth of dimples also affects the drag-coefficient. This work uses CFD Expert-Lite by Zeus Numerix Pvt. Ltd. as its solver and numerical simulations were carried out to estimate drag coefficient for simple ball and dimpled ball. A comparison study was then carried out between drag coefficients of simple ball and dimpled ball. Study of variation of drag-coefficient with depth of dimples was also carried out. The results showed that adding dimples to simple ball reduced the drag coefficient in the transition range. Transition range for dimpled ball occurred before that of smooth ball. Drag coefficient increased as the depth of dimples was increased and the percentage increment increased as the reynolds number reached higher in the transition range.

Keywords: Dimpled ball, Smooth ball, Drag-coefficient, Depth, CFD.