Role of Pair Dispersion in Turbulent Flow
Mixing and transport in turbulent flows--which have strong local concentration fluctuations--are essential in many natural and industrial systems including reactions in chemical mixers, combustion in engines and burners, droplet formation in warm clouds, and biological odor detection and chemotaxis....
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2006-02, Vol.311 (5762), p.835-838 |
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| creator | Bourgoin, Mickael Ouellette, Nicholas T Xu, Haitao Berg, Jacob Bodenschatz, Eberhard |
| description | Mixing and transport in turbulent flows--which have strong local concentration fluctuations--are essential in many natural and industrial systems including reactions in chemical mixers, combustion in engines and burners, droplet formation in warm clouds, and biological odor detection and chemotaxis. Local concentration fluctuations, in turn, are intimately tied to the problem of the separation of pairs of fluid elements. We have measured this separation rate in an intensely turbulent laboratory flow and have found, in quantitative agreement with the seminal predictions of Batchelor, that the initial separation of the pair plays an important role in the subsequent spreading of the fluid elements. These results have surprising consequences for the decay of concentration fluctuations and have applications to biological and chemical systems. |
| doi_str_mv | 10.1126/science.1121726 |
| format | Article |
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| identifier | ISSN: 0036-8075 |
| ispartof | Science (American Association for the Advancement of Science), 2006-02, Vol.311 (5762), p.835-838 |
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| source | Jstor Complete Legacy; Science Magazine |
| subjects | Convection and heat transfer Dispersion Engineering Sciences Exact sciences and technology Fluid dynamics Fluid mechanics Fluids Fluids mechanics Fundamental areas of phenomenology (including applications) Instrumentation for fluid dynamics Kinematics Mechanics Particle motion Particle tracks Particle trajectories Physics Power laws Reynolds number Turbulence Turbulent diffusion Turbulent flow Turbulent flows, convection, and heat transfer Water flow |
| title | Role of Pair Dispersion in Turbulent Flow |
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