NUMERICAL STUDY OF UNIFORM FLOW OVER GOLF BALL

The numerical simulation of uniform flow past a golfball with diameter of 42.6\,mm and withwell-distributed pits is carried out by using the large eddy simulation(LES) method, based on theSmagorinsky---Lilly subgrid scale model. The results show that thedetached point of the ball's wake is farther than that for a ball of smoothsphere and thedrag on the golf ball is smaller. Consider the uniformflow past a golf ball with the effect of clockwise and anticlockwiserotations with a speed of 100\,rad/s. The results show that the wake structure is moreuneven, which would result in the pressure perpendicular to the flowdirection. The magnitude of pressure has nothing to do with the direction of the rotation andthe drag coefficient is larger than that of a non-rotation golf ball.Rotation has an important influence on the pressure.