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@article{Rigas:2014:10.1017/jfm.2014.449,
author = {Rigas, G and Oxlade, AR and Morgans, AS and Morrison, JF},
doi = {10.1017/jfm.2014.449},
journal = {Journal of Fluid Mechanics},
pages = {1--11},
title = {Low-dimensional dynamics of a turbulent axisymmetric wake},
url = {http://dx.doi.org/10.1017/jfm.2014.449},
volume = {755},
year = {2014}
}

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TY  - JOUR
AB  - The coherent structures of a turbulent wake generated behind a bluff three-dimensional axisymmetric body are investigated experimentally at a diameter-based Reynolds number of ∼2×105 . Proper orthogonal decomposition of base pressure measurements indicates that the most energetic coherent structures retain the structure of the symmetry-breaking laminar instabilities and are manifested as unsteady vortex shedding with azimuthal wavenumber =±1 . In a rotating reference frame, the shedding preserves the reflectional symmetry and is linked with a reflectionally symmetric mean pressure distribution on the base. Due to a slow rotation of the symmetry plane of the turbulent wake around the axis of the body, statistical axisymmetry is recovered in the time average. The ratio of the time scales associated with the slow rotation of the symmetry plane and the vortex shedding is of order 100.
AU  - Rigas,G
AU  - Oxlade,AR
AU  - Morgans,AS
AU  - Morrison,JF
DO  - 10.1017/jfm.2014.449
EP  - 11
PY  - 2014///
SN  - 0022-1120
SP  - 1
TI  - Low-dimensional dynamics of a turbulent axisymmetric wake
T2  - Journal of Fluid Mechanics
UR  - http://dx.doi.org/10.1017/jfm.2014.449
UR  - https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/lowdimensional-dynamics-of-a-turbulent-axisymmetric-wake/26878C373FA198C8EEBC720BBBC5140F
UR  - http://hdl.handle.net/10044/1/27427
VL  - 755
ER  -

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