Question

3. Calculate the fall velocity of an 1/8 in. diameter water drop in air. Assume the water drop to behave as a sphere with surface. water air up

Answer 1

In the given problem, we need to calculate the fall velocity of water drop in air. The complete step by step procedure for solution is provided below.

solution! data! Griven Diame ter, 0=in. O. 125 Ft O.125 in 12 waten drop in alx, Since For wates, FB a Specific welght, = 62.4 1blf3 Then, 2. slugs/fi 3 -) Kinematic viscosity fr?/s 408 H20 d=1.57x104 3eco 4 Cou125)Ft (62-4!/) 3 (2-38x103 slugs co ft3 19.1 ftls Rey nolds number 66.3 U Re = 1.57 x10 FE? ci) ASSUME, Co = 0.5 19.1 from (i), = 27.0 fls 0.5 66.3 X27 =1790 From ),

a function graph (orag coefficient From Smooth sphere) for a Reynolds number of t0.5. CD = 0.4 Then, (From ci)) For which |৭.। ft/s 30.2 And, 66:3 x 302 Re Reynolds number, Re 2000 from graph, CD= 0.4 Then, 30.2 ft/s Augwer
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