A new Eulerian-Lagrangian length-scale in turbulent flows

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We introduce a time-dependent Eulerian-Lagrangian length-scale and an inverse locality hypothesis which explain scalings of second order one-particle Lagrangian structure functions observed in Kinematic Simulations (KS) of homogeneous isotropic turbulence. Our KS results are consistent with the physical picture that particle trajectories are more/less autocorrelated if they are smoother/rougher as a result of encountering less/more straining stagnation points, thus leading to enhanced/reduced turbulent diffusion.
4 pages, 3 figures, submitted to PRL

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Chaotic Dynamics

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http://salesiana.dossiersoluciones.com/handle/123456789/80324

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/nlin/0209058
 http://arxiv.org/abs/nlin/0209058

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arXiv