Folding characterization in conservative chaotic fluid flows

Palladino, Fábio H.; Corso, Gilberto; Caldas, Iberê Luiz

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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Folding characterization in conservative chaotic fluid flows

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Author(s):	Palladino, Fábio H. ; Corso, Gilberto ; Caldas, Iberê Luiz ^[3] Total Authors: 3
Document type:	Journal article
Source:	CHAOS SOLITONS & FRACTALS; v. 19, n. 5, p. 1087-1094, Mar. 2004.
Field of knowledge:	Physical Sciences and Mathematics - Physics
Abstract
We study transport of passive scalar fields in a bidimensional incompressible chaotic fluid flow. For a spatially smooth velocity field with impulsive perturbations, the model is described by a randomized standard mapping. We numerically investigate passive scalar field transport for given initial concentration distributions and their dependence on the nonlinearity and noise amplitude. We show that space and time concentration histograms are determined by the underlying mechanism of stretching and folding. Moreover, to characterize this process we introduce a parameter, the average derivative of a tracer line length, which shows interesting scale properties. (AU)

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