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Fig 41. Circular cylinder at R=13.1

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“The standing eddies become elongated in the flow direction as the speed increases. Their length is found to increase linearly with Reynolds number until the flow becomes unstable above R=40.” Photograph by Sadathoshi Taneda

General Info>

General Info #

This post is part of a series on flow separation, studied for the case of flow past a circular cylinder at different Reynolds numbers. In the current figure, it is clearly visible that the vortices behind the cylinder, which appear due to separation, grew in comparison to Figure 40. Also, one can see that the flow separates at an earlier point on the cylinder.

The main theory and simulation and visualization set-up are discussed in the web post from Figure 42. The full series is:

An overview of these posts can be viewed here: