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Engineering · Mechanical Engineering
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Two isothermal (300 K, 1 atm) laminar jets with different diameters have the same volumetric flowrates. (a) What is the ratio of their Reynolds numbers? Express in terms of r (r, and r2) (b) For the volumetric flow rate of 5 cm/s, and r, 3 mm and r2 5 mm for the two jets, respectively, calculate the spreading angles for the two jets (for u/ua 0.5). eternine the ial ocation( oer ertne fue cty ha decayed to 1/10 of the nozzle-exit velocity for each jet.

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