Is strength of a vortex tube vary with time?(a) False(b) TrueI have been asked this question during an interview for a job.My doubt is from The Vortex Filament, Biot-Savart Law, Helmholtz Theorem topic in chapter Flow over Airfoils over Finite Wing of Aerodynamics

Is strength of a vortex tube vary with time?(a) False(b) TrueI have be

1.	Is strength of a vortex tube vary with time?(a) False(b) TrueI have been asked this question during an interview for a job.My doubt is from The Vortex Filament, Biot-Savart Law, Helmholtz Theorem topic in chapter Flow over Airfoils over Finite Wing of Aerodynamics
Answer» RIGHT ANSWER is (a) False To EXPLAIN: The strength of a vortex tube does not vary with time, fluid elements lying on a vortex LINE at some instant continue to lie on that vortex line. More simply, vortex lines move with the fluid, also vortex lines and tubes MUST appear as a closed loop.

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Is strength of a vortex tube vary with time?(a) False(b) TrueI have been asked this question during an interview for a job.My doubt is from The Vortex Filament, Biot-Savart Law, Helmholtz Theorem topic in chapter Flow over Airfoils over Finite Wing of Aerodynamics

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