Figure 8: This plot present data for configurations 1, 4, 7, 9, 10 (table 1). The dispersion in ring speed is apparent from this representative collection of experimental runs illustrating ring position vs time. Ring velocity can be determined from line gradient, and variability <10% for each group (except for the 25mm orifice example). Notably, the rings of lower energy and speed are more variable. With a 2.5cm diameter orifice, and lower pump speeds, the ring might not even form.
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