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Hello Crowsnest. You produced the excellent diagram with the caption “Streamlines for the incompressible potential flow around a circular cylinder in a uniform onflow.” It is available at Potential flow#Description and characteristics. It shows flow with circulation of zero.
There is a need for a similar diagram but with a non-zero circulation. Such a diagram could be applied at Magnus effect and Kutta–Joukowski theorem. The symmetry of the streamlines about a vertical axis through the centre of the cylinder would be helpful in demonstrating that in two-dimensional flow the upwash upstream of a cylinder is a mirror image of the downwash downstream of the cylinder. It would also help demonstrate that there is no lift-induced drag in two-dimensional flow about an airfoil.
The diagram I have in mind is often used in text books and websites. For example, the one by Prof Richard Fitzpatrick (University of Texas) shown at the following website:
Flow Past a Cylindrical Obstacle
Are you able to produce such a diagram for use on Wikipedia? Dolphin (t) 12:35, 30 March 2024 (UTC)
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