Anomalous diffusion of inertial particles in random parallel flows: theory and numerics face to face

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Boi, S (Author) Other; Afonso, MM (Author) FCUP; Mazzino, A (Author) Other

Journal

Title: Journal of Statistical Mechanics: Theory and Experiment

Vol. 2015

ISSN: 1742-5468

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 8 Citations

Other information

Authenticus ID: P-00N-NM5

DOI: 10.1088/1742-5468/2015/10/p10023

Abstract (EN): The large-scale transport of inertial particles is investigated by means of Lagrangian simulations. Our main focus is on the possible emergence of anomalous diffusion for the class of random parallel flows. For such flows, a perturbative prediction in the limit of small inertia has recently become available in the literature. Anomalous diffusion was traced back to the possible divergence of the first-order correction to the eddy diffusivity of the tracer limit. Our numerical results show that the conditions for the emergence of anomalous diffusion are affected by resummations of higher-order perturbative contributions which regularize the resulting diffusion process, thus ruling out the occurrence of anomalous diffusion.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 21