I. Theoretical Transitions Between Flow Patterns



A cylinder with a diameter D is placed in a flow with a velocity U in the direction of the x-axis, as shown on figure 1 below :


Figure 1 : Flow past the cylinder

The Reynolds number Re = UD/n characterizes the flow pattern past the cylinder, and the following transitions have been experimentally observed (e.g. see figure 2) :  


Figure 2 : Streaklines in the wake behind a cylinder for different Reynolds numbers.

Figure 3 : Vortices in the wake behind the cylinder (click on picture to animate)



Back to previous page

Back to top of page

To next page