1.

Which of these equations represent vorticity?(a) ∇.V(b) ∇ × V(c) ∇.V^2(d) (∇.V) × VI have been asked this question in exam.The query is from Irrotational Flow in chapter Velocity Potential Equation of Aerodynamics

Answer»

Correct option is (b) ∇ × V

The best I can explain: Vorticity REPRESENTS the CIRCULATION motion of the fluid as it flows. It is given by the curl of the VELOCITY vector (∇ × V). The curl operation determines the circulatory NATURE. For an irrotational flow vorticity is not equal to zero.



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