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Evolution of isolated turbulent trailing vortices
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10.1063/1.2840200
/content/aip/journal/pof2/20/3/10.1063/1.2840200
http://aip.metastore.ingenta.com/content/aip/journal/pof2/20/3/10.1063/1.2840200
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Evolution of global quantities for case I. (a) Mean and turbulent kinetic energy; (b) peak mean flow quantities; (c) radial measures.

Image of FIG. 2.
FIG. 2.

isosurfaces shaded with axial and azimuthal vorticity contours for case I at . Light/dark surface: . (a) ; (b) .

Image of FIG. 3.
FIG. 3.

Axial vorticity contours for case E. Negative vorticity shown as white patch/dashed lines. (a) Initial (); (b) linear growth (); (c) saturation (); (d) saturation (); (e) decay (); (f) decay ().

Image of FIG. 4.
FIG. 4.

Azimuthal vorticity contours for case E. Negative vorticity shown as white patch/dashed lines. (a) Initial condition (); (b) linear growth (); (c) saturation (); (d) saturation (); (e) decay (); (f) decay ().

Image of FIG. 5.
FIG. 5.

Case E (saturation): isosurfaces (light/dark shade ). Also shown is a schematic of vortex lines (dashed lines are at a smaller radius compared to solid lines).

Image of FIG. 6.
FIG. 6.

Evolution of mean quantities for case I. (Dashed lines) ; (dash-dotted lines) ; (solid lines) . The initial condition is also shown. (a) Circulation; (b) axial vorticity; (c) azimuthal vorticity.

Image of FIG. 7.
FIG. 7.

Evolution for case E during the decay phase. Dashed line is the earliest shown instant and the solid line is the latest. Laminar solution corresponding to the earliest instant is also shown. (a) ; (b) .

Image of FIG. 8.
FIG. 8.

Case I: isosurfaces superposed with contours. Dark shade corresponds to negative . (a) ; (b) ; (c) ; (d) .

Image of FIG. 9.
FIG. 9.

Schematic of hairpin structure. Dashed lines depict the axis of local vorticity vector.

Image of FIG. 10.
FIG. 10.

Evolution of “” quantities for case I. (Dashed lines) ; (dash-dotted lines) ; (solid lines) . (a) angular momentum; (b) axial momentum.

Image of FIG. 11.
FIG. 11.

Reynolds stress and some budgets for case I at times , with increasing time corresponding to decreasing peak production. (a) Budget for ; (b) budget for ; (c) ; (d) .

Image of FIG. 12.
FIG. 12.

Representative instantaneous streamwise sections during the decay phase. Contours of and lines of are shown. Negative shaded dark. Negative shown in dashed lines. (a) Case E, saturation phase; (b) case I, .

Image of FIG. 13.
FIG. 13.

Comparison of growth rate of kinetic energy in the axial mode for case E.

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/content/aip/journal/pof2/20/3/10.1063/1.2840200
2008-03-03
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Evolution of isolated turbulent trailing vortices
http://aip.metastore.ingenta.com/content/aip/journal/pof2/20/3/10.1063/1.2840200
10.1063/1.2840200
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