A series of laboratory experiments were conducted to determine the carrying capacity or ability of a liquid to lift solid samples while flowing vertically through a pipe. Water and CMC solutions were used as transport media. Sample velocity was measured with an accuracy of 0.01 second by means of a equipment using photocells.
Results obtained are as follows:
1. Slip velocity (the difference between liquid and solid sample velocity) is not constant but is affected by both the velocity and the viscosity of liquid (Table 6).
2. Carrying capacity of liquid increases with its viscosity (Figs. 8 and 9).
3. The ratio of sample diameter to pipe diameter effects observed carrying capacity of liquids of lower viscosity at lower velocity but does not effect that of liquids of higher viscosity at higher velocity.
4. Except for low liquid viscosity, turbulent flow is not necessary to increase carrying capacity (Figs. 8 and 9).
5. There is no relationship between the velocity of a solid sample falling through quiescent liquid and the slip velocity of the same sample (Table 6).
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