A new method to extract axes of tubular vortices in turbulence is proposed.Loci of centers of swirling motions are detected by using anature that the pressure tends to be lower in the center of a swirling motion than surrounding region.This method is applied to a homogeneous isotropic turbulence to demonstrate that swirling motions actually exist around these axes.
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Miura et al. (1997) studied this question.
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