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On Spatial Segregation of Vortices and Pressure Eddies in a Confined Slot Jet

On Spatial Segregation of Vortices and Pressure Eddies in a Confined Slot Jet, K. Hanjalic and R. Mullyadzhanov. Physics of Fluids 2015, 27  (3), 031703.

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Abstract

A vortex in fluids is usually associated with pressure minimum, a presumption that served for defining various criteria for eduction of vortices and coherent structures in turbulence. We demonstrate that in a shallow confined turbulent slot jet, the dominant vortical structures may detach from pressure eddies. The numerical simulations show that pressure field proceeds by its own dynamics in which the irrotational contribution gradually takes over the weakened rotational effect of the wall-damped planar jet-edge vortices. Pressure sources move with their own velocity creating depressions and domes, the latter acting as “obstacles” that enhance jet meandering. The pressure zig-zag pattern is only weakly reinforced by the decaying planar vortices. (C) 2015 AIP Publishing LLC.

BibTeX

@article{ ISI:000352309400003,
Author = {Hanjalic, K. and Mullyadzhanov, R.},
Title = {On Spatial Segregation of Vortices and Pressure Eddies in a Confined Slot Jet},
Journal = {Physics of Fluids},
Year = {2015},
Volume = {27},
Number = {3},
Month = {},
Abstract = {A vortex in fluids is usually associated with pressure minimum, a presumption that served for defining various criteria for eduction of vortices and coherent structures in turbulence. We demonstrate that in a shallow confined turbulent slot jet, the dominant vortical structures may detach from pressure eddies. The numerical simulations show that pressure field proceeds by its own dynamics in which the irrotational contribution gradually takes over the weakened rotational effect of the wall-damped planar jet-edge vortices. Pressure sources move with their own velocity creating depressions and domes, the latter acting as ``obstacles{''} that enhance jet meandering. The pressure zig-zag pattern is only weakly reinforced by the decaying planar vortices. (C) 2015 AIP Publishing LLC.},
DOI = {10.1063/1.4916351},
Pages = {031703},
ISSN = {1070-6631},
EISSN = {1089-7666},
Unique-ID = {ISI:000352309400003},
}

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