Coefficient of Viscosity Control of flow around a circular cylinder by bleed near the separation points. M. D. Atkins , L. Dala and. This has been well studied for round bodies like spheres and cylinders.The drag coefficient of a sphere will change rapidly from about 0.5 to 0.2 at a Reynolds number in the range of 300000. Drag coefficient of a cylinder The drag coefficient is generally given by the formula Where; ρ is the density of the cylinder, FD is the drag force, v is the velocity of the cylinder moving in the fluid, and A is the area of the cylinder. Cylinders For the mesh i tried a face mesching and edge sizing on the cylinder wall and a global face sizing getting almost 100000 cells. Aerodynamic Drag, Data for Airfoils, Wings, Aircraft, Automobiles The drag coefficient for the cylinder is defined as: The cylinder axis is oriented perpendicular to the stream. The aerodynamic data was compiled using a tool called xFoil for a Reynolds Number equal to 1 million. C d. R e / 10 4. How to find drag of a cylinder? - Physics Stack Exchange The drag coefficient for the cylinder is defined as: where FD is the total force in the flow direction (i.e. At the moment I'm carrying out simulations in CFX of flow over a 2D Cylinder in a rectangular domain immersed in a high reynolds flow to determine its drag coefficient. B*4 - DTIC