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Yes frame dragging is related to vorticity; consider Kerr spacetime for simplicity in the following. In Kerr space-time one has a time-like Killing field $\xi^{\alpha}$. The congruence of observers $u^{\alpha} = \xi^{\alpha}/|\xi|$ following orbits of $\xi^{\alpha}$ are of course the observers who are at rest with respect to the central mass and hence are ...


The classical fluid mechanical idea of a vortex is well illustrated by this picture, which shows a vortex created by the passage of an aircraft wing, revealed by colored smoke. In classical fluid dynamics, a region of mostly rotational fluid around an axis line is known as a vortex. This axis line can be curved or straight, depending on the physical ...

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