The force coefficients and heat transfer related to a circular cylinder with grooved surfaces are studied at Re ≤ 200. Three types of grooved surfaces are examined: square, triangle, and dimple. The grooves are arranged at θ = 0°, 30°, 45°, 60°, 90° from the forward stagnation point of the cylinder. It is shown that the existence of a groove controls the dynamic behavior of the vortices; as such lift and drag coefficients have been varied considerably, depending on the shape of the groove and θ. The coefficients appear very sensitive to triangle grooved surface, in particular, as θ varies to 45°. The results reveal that triangle grooved surface could produce minimum drag coefficient when θ varies to 45⁰ for all examined Re; this is found much lower than that of the square and dimple grooved surfaces and even smooth cylinder. A significant enhancement of the Nu is attained in the wake of the triangle grooved cylinder surface with the angle of the location of 45⁰. At low Reynolds number (Re = 50), the Nu value of triangle grooved surface with θ = 0°is shown higher than that of other grooved surfaces, whereas this value is found to the lowest at high Reynolds number (Re = 200).

力系数和热有关的圆柱带槽表面转印了研究在重新≤200三种类型的沟槽表面的被检查：正方形，三角形，和凹坑。凹槽从圆柱体的向前停滞点开始以θ = 0°，30°，45°，60°，90°排列。结果表明，凹槽的存在控制着涡流的动力学行为。因为这样的升力和阻力系数已经根据凹槽的形状和θ进行了很大的变化。尤其是当θ变为45°时，该系数对三角形沟槽表面显得非常敏感。结果表明，当θ变化为45 °时，三角形沟槽表面可能产生最小的阻力系数。所有检验的Re为⁰ ; 发现它比方形和浅凹的沟槽表面甚至光滑的圆柱体的表面低得多。在三角形开槽圆柱面的后角位置为45 ⁰时，Nu显着增强。在低雷诺数（Re  = 50）时，显示θ = 0°的三角形沟槽表面的Nu值高于其他沟槽表面，而在高雷诺数（Re  = 200）时，该值最低。