Localized shear generates three-dimensional transport

Understanding the mechanisms that control three-dimensional (3D) fluid transport is central to many processes, including mixing, chemical reaction, and biological activity. Here a novel mechanism for 3D transport is uncovered where fluid particles are kicked between streamlines near a localized shea...

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Bibliographic Details
Published in:Chaos (Woodbury, N.Y.) N.Y.), 2017-04, Vol.27 (4), p.043102-043102
Main Authors: Smith, Lachlan D., Rudman, Murray, Lester, Daniel R., Metcalfe, Guy
Format: Article
Language:English
Subjects:
Biological activity
Chemical reactions
Computational fluid dynamics
Fluid flow
Organic chemistry
Transport
Two dimensional models
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Summary:Understanding the mechanisms that control three-dimensional (3D) fluid transport is central to many processes, including mixing, chemical reaction, and biological activity. Here a novel mechanism for 3D transport is uncovered where fluid particles are kicked between streamlines near a localized shear, which occurs in many flows and materials. This results in 3D transport similar to Resonance Induced Dispersion (RID); however, this new mechanism is more rapid and mutually incompatible with RID. We explore its governing impact with both an abstract 2-action flow and a model fluid flow. We show that transitions from one-dimensional (1D) to two-dimensional (2D) and 2D to 3D transport occur based on the relative magnitudes of streamline jumps in two transverse directions.
ISSN:1054-1500
1089-7682
DOI:10.1063/1.4979666