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Predict the approximate shape and calculate the terminal velocity of each of the following fluid particles, which have the same volume of 14.1 mm3 . When possible, employ at least 2 methods in your velocity calculations. Compare and comment on the results. a. An oil droplet rising in water b. A water droplet falling in an oil c. An oil droplet falling in air (20oC, 1 atm) d. A water droplet falling in air (20oC, 1 atm) e. An air bubble rising in water (20oC, 1 atm) Data: Oil: = 780 kgm-3 ; = 50 cp Water: = 1000 kgm-3 ; = 1 cp Air: = 1.21 kgm-3 ; = 0.0185 cp Oil-water interfacial tension = 0.02 Nm-1 Air-water interfacial tension = 0.1 Nm-1 Air-oil interfacial tension = 0.05 Nm-1

2.6 Predict the approximate shape and calculate the terminal velocity of each of the following fluid particles, which have the same volume of 14.1mm3. When possible, employ at least 2 methods in your velocity calculations. Compare and comment on the results. a. An oil droplet rising in water b. A water droplet falling in an oil c. An oil droplet falling in air (20C,1atm) d. A water droplet falling in air (20C,1atm) e. An air bubble rising in water (20C,1atm) Data: Oil: =780kgm3;=50cp Oil-water interfacial tension =0.02Nm1 Water: =1000kgm3;=1cp Air-water interfacial tension =0.1Nm1 Air: =1.21kgm3;=0.0185cp Air-oil interfacial tension =0.05Nm1