G1102 サッカーボールのパネルの違いによるボール後流の違い(GS11 物体まわり流)

Abstract

It is known that low rotating or no-rotating balls have the erratic ball path especially in the new different panels of soccer balls. Velocity distributions of the balls wake wake were measured by Dynamic PIV on five balls of the different panels. Three dimensional twin vortices and jets between them were found in each wake of the ball. The velocities of the jet cores were different according to the difference of the ball panel. Especially, large velocity vectors were found in the ball wake which was heard to be big erratic path.