Drag Forces on Oscillating Cylinders in a Uniform Flow Available to Purchase

This paper describes the drag coefficients of cylinders oscillated in both in-line and transverse directions to a uniform flow. The drag coefficients C_D have been obtained experimentally over a wide range of oscillation frequencies, amplitude and flow velocities for the cylinders of various diameters under simulated practical offshore conditions. New expressions are proposed for the drag coefficients C_D of an oscillating cylinder in a uniform flow. The boundary between the regions, where C_D≃1 and C_D<1, is clearly established by employing the Keulegan-Carpenter number and the reduced velocity as dimensionless numbers. These dimensionless numbers also clearly describe C_D variation within the region of rapid C_D value decrease.