What are the characteristics of fluid flow over a cylinder?

Fluid flow over a cylinder is characterized by the formation of vortices, separation of flow, and changes in pressure distribution. Vortices are created at the edges of the cylinder, causing fluctuations in velocity and pressure. The flow separates from the cylinder at certain points, leading to regions of low pressure behind the cylinder. These characteristics can affect the drag force experienced by the cylinder and impact its overall performance in a fluid environment.