# Can vortex criteria be objectivized?

@article{Haller2020CanVC, title={Can vortex criteria be objectivized?}, author={George Haller}, journal={Journal of Fluid Mechanics}, year={2020}, volume={908} }

Abstract Several procedures have been proposed to modify non-objective (observer-dependent) local vortex criteria so that they become objective. These modifications are only justifiable if they are equivalent to applying the original criteria after a generalized (possibly nonlinear) frame change is performed on the flow domain; otherwise, the arguments used in deriving those criteria no longer apply. To examine the feasibility of available objectivization procedures, we derive here necessary… Expand

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