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The free vortex flow forms _________

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in Aerodynamics by (773k points)
The free vortex flow forms _________

(a) straight lines

(b) concentric circles

(c) parabola

(d) hyperbola

The question was asked in homework.

This question is from Vortex Flow in division Inviscid & Incompressible Flow of Aerodynamics

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Correct option is (b) concentric circles

Easy explanation: The free vortex flow is a circulatory flow of the fluid such that its stream lines are concentric circles. The velocity components for a free vortex flow are Ur and Uθ and is equal to Ur=0 and Uθ=circulation/ 2*pi*r.

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