The effect of Eulerian intermittency on the Lagrangian statistics of relative dispersion in fully developed turbulence is investigated. A scaling range spanning many decades is achieved by generating a multi-affine synthetic velocity field with prescribed intermittency features. The scaling laws for the Lagrangian statistics are found to depend on intermittency in agreement with a multifractal description. As a consequence of the Kolmogorov law, the Richardson law for the variance of pair separation is not affected by intermittency corrections.
Relative dispersion in fully developed turbulence: Lagrangian statistics in synthetic flows / G., Boffetta; A., Celani; Crisanti, Andrea; Vulpiani, Angelo. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - STAMPA. - 46:2(1999), pp. 177-182. [10.1209/epl/i1999-00242-8]
Relative dispersion in fully developed turbulence: Lagrangian statistics in synthetic flows
CRISANTI, Andrea;VULPIANI, Angelo
1999
Abstract
The effect of Eulerian intermittency on the Lagrangian statistics of relative dispersion in fully developed turbulence is investigated. A scaling range spanning many decades is achieved by generating a multi-affine synthetic velocity field with prescribed intermittency features. The scaling laws for the Lagrangian statistics are found to depend on intermittency in agreement with a multifractal description. As a consequence of the Kolmogorov law, the Richardson law for the variance of pair separation is not affected by intermittency corrections.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
