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Is vortex sheet is unstable at high Reynolds number?

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in Aerodynamics by (773k points)
Is vortex sheet is unstable at high Reynolds number?

(a) True

(b) False

I got this question in an online quiz.

The above asked question is from The Vortex Sheet in portion Incompressible Flow over Airfoils of Aerodynamics

1 Answer

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by (720k points)
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Best answer
The correct choice is (a) True

The best I can explain: The discontinuity in the tangential velocity means that the flow has infinite vorticity in a vortex sheet. At high Reynolds numbers vortex sheets tend to be unstable and they exhibit Kelvin-Helmholtz instability. The Kelvin-Helmholtz instability can occur when there is velocity shear in a single continuous fluid.

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