Research Article

Investigation of Vortex Rings for Free Jet and Synthetic Jet at Various Reynolds Numbers and Strouhal Numbers

Figure 8

Evolution of vortex rings for two-dimensional free jet under Re = 2400: (a) t = 2.4 s; (b) t = 4.4 s; (c) t = 5.6 s; (d) t = 8.4 s; (e) t = 12 s; (f) t = 18 s.
(a)
(b)
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(d)
(e)
(f)