Question: In low-speed external flow over a bluff object, vortices are shed from the object (as shown in Fig. P7.70). The frequency of vortex shedding, (f

In low-speed external flow over a bluff object, vortices are shed from the object (as shown in Fig. P7.70). The frequency of vortex shedding, $f \doteq 1 / \mathrm{T}$, depends on $ho, \mu, V$, and $d$. Make a dimensional analysis of this phenomenon. Transform the dimensionless parameters that you developed into "standard" parameters. What are their names? Two identically shaped objects with a size ratio 2:1 are tested in air flow. What velocity ratio is necessary for dynamic similarity? What is the ratio of vortex-shedding frequencies?

Figure P7.70

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