Civil Engineering Reference
In-Depth Information
4.5
Circular cylinders
4.5.1
Effects of Reynolds number and surface roughness
For bluff bodies with curved surfaces such as the circular cylinder, the positions of the
separation of the local surface boundary layers are much more dependent on viscous
forces than is the case with sharp-edged bodies. This results in a variation of drag forces
Figure 4.16
Effect of Reynolds number, corner
radius and surface roughness on drag
coefficients of square sections (Scruton, 1981).
