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Axisymmetric turbulent wakes with new nonequilibrium similarity scalings

Axisymmetric turbulent wakes with new nonequilibrium similarity scalings
Axisymmetric turbulent wakes with new nonequilibrium similarity scalings
The recently discovered nonequilibrium turbulence dissipation law implies the existence of axisymmetric turbulent wake regions where the mean flow velocity deficit decays as the inverse of the distance from the wake-generating body and the wake width grows as the square root of that distance. This behavior is different from any documented boundary-free turbulent shear flow to date. Its existence is confirmed in wind tunnel experiments of wakes generated by plates with irregular edges placed normal to an incoming free stream. The wake characteristics of irregular bodies such as buildings, bridges, mountains, trees, coral reefs, and wind turbines are critical in many areas of environmental engineering and fluid mechanics.
144503-[5pp]
Nedić, J.
ab95b549-2e66-493b-aae8-1d3c44b26225
Vassilicos, J.C.
e3e74602-557c-450b-aa9a-3d28a1721f1a
Ganapathisubramani, B.
5e69099f-2f39-4fdd-8a85-3ac906827052
Nedić, J.
ab95b549-2e66-493b-aae8-1d3c44b26225
Vassilicos, J.C.
e3e74602-557c-450b-aa9a-3d28a1721f1a
Ganapathisubramani, B.
5e69099f-2f39-4fdd-8a85-3ac906827052

Nedić, J., Vassilicos, J.C. and Ganapathisubramani, B. (2013) Axisymmetric turbulent wakes with new nonequilibrium similarity scalings. Physical Review Letters, 111 (14), 144503-[5pp]. (doi:10.1103/PhysRevLett.111.144503).

Record type: Article

Abstract

The recently discovered nonequilibrium turbulence dissipation law implies the existence of axisymmetric turbulent wake regions where the mean flow velocity deficit decays as the inverse of the distance from the wake-generating body and the wake width grows as the square root of that distance. This behavior is different from any documented boundary-free turbulent shear flow to date. Its existence is confirmed in wind tunnel experiments of wakes generated by plates with irregular edges placed normal to an incoming free stream. The wake characteristics of irregular bodies such as buildings, bridges, mountains, trees, coral reefs, and wind turbines are critical in many areas of environmental engineering and fluid mechanics.

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More information

Published date: 2013
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 359352
URI: http://eprints.soton.ac.uk/id/eprint/359352
PURE UUID: ea4290e4-7a7b-4627-9b07-bea186e52902
ORCID for B. Ganapathisubramani: ORCID iD orcid.org/0000-0001-9817-0486

Catalogue record

Date deposited: 28 Oct 2013 16:00
Last modified: 26 Nov 2021 02:56

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Contributors

Author: J. Nedić
Author: J.C. Vassilicos

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