The lubrication form of the equations governing the flow of a thin liquid film on a horizontal right circular cylinder is derived. The equations are discretized and solved numerically using an alternating-direction implicit algorithm. Simulations demonstrate that the transition from a uniform coating to a final configuration of distinct drops follows a similar evolution for a wide range of cyli...

The 3D structure of the wake behind a circular cylinder in cross-flow is studied experimentally using stereo PIV technique, Reynolds number was around 5 thousands. statistical characteristics along axis are effectively constant and thus 2D, however instantaneous flow-field fully 3D. Within dynamical flow, streamwise vortices spots velocity component pulsations detected.

A two-dimensional free surface flow past a circular cylinder forced to performstreamwise oscillations in the presence of an oncoming uniform flow is investigated at a Reynolds number of R = 200 and fixed displacement amplitude, A = 0.13, for the forcing frequency-to-natural shedding frequency ratios, f/f0 = 1.5, 2.5, 3.5. This study is based on numerical solutions of the special integral form o...