Abstract
In this study the flow characteristics around square cylinder with various grooves shapes is investigated in detailed by drag coefficient measurement. The cross section configuration of the grooves are rectangular, arc and triangular. The drag is measured by a wind tunnel experiment. As a result, it is understood that square cylinder with grooves has lower drag coefficient compares with square cylinder without grooves. Rectangular shaped grooves has the lowest drag coefficient compared with arc and triangle grooves shape. The square cylinder with the rectangular shape grooves has biggest reduction rate compared to arc and triangular shape grooves.
