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Separation of heavy particles in turbulence
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Fouxon, Itzhak and Horvai, Péter (2008) Separation of heavy particles in turbulence. Physical Review Letters, Volume 100 (Number 4). Article. No. 040601. doi:10.1103/PhysRevLett.100.040601 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.100.040601
Abstract
We study motion of small particles in turbulence when the particle relaxation time falls in the range of inertial time scales of the flow. Because of inertia, particles drift relative to the fluid. We demonstrate that the collective drift of two close particles makes them see local velocity increments fluctuate fast. This allows us to introduce Langevin description for separation dynamics. We describe the behavior of the Lyapunov exponent and give the analogue of Richardson's law for separation above viscous scale.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Heavy particles (Nuclear physics), Turbulence | ||||
Journal or Publication Title: | Physical Review Letters | ||||
Publisher: | American Physical Society | ||||
ISSN: | 0031-9007 | ||||
Official Date: | 1 February 2008 | ||||
Dates: |
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Volume: | Volume 100 | ||||
Number: | Number 4 | ||||
Number of Pages: | 4 | ||||
Page Range: | Article. No. 040601 | ||||
DOI: | 10.1103/PhysRevLett.100.040601 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published |
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