Urea pellets are made by spraying drops of molten urea into cold gas at the top of
Question:
Urea pellets are made by spraying drops of molten urea into cold gas at the top of a tall tower and allowing the material to solidify as it falls. Pellets 6 mm in diameter are to be made in a tower 25 m high containing air at 20°C. The density of urea is 1,330 kg/m3.
(a) What would be the terminal velocity of the pellets, assuming free-settling conditions?
(b) Would the pellets attain 99 percent of this velocity before they reached the bottom of the tower?
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Step by Step Answer:
a To calculate the terminal velocity of the urea pellets we can use the following equation Vt sqrt4 ...View the full answer
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Related Book For 
Unit Operations Of Chemical Engineering
ISBN: 9780072848236
7th Edition
Authors: Warren McCabe, Julian Smith, Peter Harriott
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