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Vortex shedding from a circular cylinder near a moving ground
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10.1063/1.2710273
/content/aip/journal/pof2/19/2/10.1063/1.2710273
http://aip.metastore.ingenta.com/content/aip/journal/pof2/19/2/10.1063/1.2710273

Figures

Image of FIG. 1.
FIG. 1.

Schematic of the cylinder model and end-plates.

Image of FIG. 2.
FIG. 2.

Model installation in the wind tunnel.

Image of FIG. 3.
FIG. 3.

Mean drag coefficient of a circular cylinder in the ground effect.

Image of FIG. 4.
FIG. 4.

Mean lift coefficient of a circular cylinder in the ground effect.

Image of FIG. 5.
FIG. 5.

Oil flow patterns on the upper surface of the cylinder with and without end-plates, .

Image of FIG. 6.
FIG. 6.

Oil flow patterns on the bottom surface of the cylinder with and without end-plates, .

Image of FIG. 7.
FIG. 7.

Separation angle vs gap ratio for the cylinder with and without end-plates.

Image of FIG. 8.
FIG. 8.

Time-averaged flow fields behind the cylinder with end-plates : (a–d) velocity vectors, (e–h) contours of streamwise velocity, and (i–l) contours of spanwise vorticity, at four different of (a, e, i) 0.6, (b, f, j) 0.4, (c, g, k) 0.3, and (d, h, l) 0.2; .

Image of FIG. 9.
FIG. 9.

Typical instantaneous spanwise vorticity contours behind the cylinder with end-plates : (a) , and (b) ; .

Image of FIG. 10.
FIG. 10.

Instantaneous swirl strength contours behind the cylinder with end-plates : (a) , and (b) ; . Symbols indicate the positions of vortex cores identified by the peaks of swirl strength with .

Image of FIG. 11.
FIG. 11.

Positions of vortex cores (extracted from 100 instantaneous PIV data for each case) behind the cylinder with end-plates : (a) , (b) , (c) , and (d) ; .

Image of FIG. 12.
FIG. 12.

Time-averaged flow fields behind the cylinder without end-plates: (a, b) velocity vectors, (c, d) contours of streamwise velocity, and (e, f) contours of spanwise vorticity, at two different of (a, c, e) 0.6, and (b, d, f) 0.2; .

Image of FIG. 13.
FIG. 13.

Positions of vortex cores (extracted from 100 instantaneous PIV data for each case) behind the cylinder without end-plates: (a) , and (b) =0.2; .

Image of FIG. 14.
FIG. 14.

Mean streamwise velocity profiles behind the cylinder: (a) , and (b) ; . Circles show the results for the cylinder with end-plates , and cross marks show the results for the cylinder without end-plates.

Tables

Generic image for table
Table I.

Summary of earlier experiments on the flow around a circular cylinder near a plane boundary.

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/content/aip/journal/pof2/19/2/10.1063/1.2710273
2007-02-27
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Vortex shedding from a circular cylinder near a moving ground
http://aip.metastore.ingenta.com/content/aip/journal/pof2/19/2/10.1063/1.2710273
10.1063/1.2710273
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