GATE AE 2025 AE Q20: Potential Flow Theory

Consider a pair of point vortices with clockwise circulation

each. The distance between their centers is

, as shown in the figure. Assume two-dimensional, incompressible, inviscid flow. Which one of the following options is correct?

Your answerChoose one option.

The vortices translate downwards together with a velocity

The vortices translate upwards together with a velocity

The vortices rotate clockwise around each other about their centroid O.

The vortices rotate counter-clockwise around each other about their centroid O.

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