Abstract
When a particle falls under the influence of gravity, it will accelerate until the frictional drag in the fluid balances the gravitational forces. At this point it will continue to fall at constant velocity. This is the terminal velocity or free-settling velocity. The general formula for spherically shaped particles is
Depending on the size of the particle, various forms of Equation (7.1) are used to calculate the actual terminal velocity. Figure 7.1 summarizes the equations and their application.
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References
E. E. Ludwig, Applied Process Design for Chemical and Petrochemical Plants, Vol. 1, Gulf Publishing Co., Houston, Texas, 1964, p. 133.
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Selected Reading
J. H. Abbott, and D. C. Drehmel, Control of fine particulate emissions, Chem. Eng. Prog., December (1976).
J. A. Brink, W. F. Burggrabe, and L. E. Greenwell, Mist removal from compressed gases, Chem. Eng. Prog., Vol. 62, No. 4, April (1966).
S. Calvert, How to choose a particulate scrubber, Chem. Eng., August 29 (1977).
G. J. Celenza, Designing air pollution control systems, Chem. Eng. Prog., Vol. 66, No. 11, November (1970).
J. F. Kuong, Nomograph finds cyclone particle size, Hydrocarbon Processing, March (1967).
E. E. Ludwig, Applied Process Design for Chemical and Petro-Chemical Plants, Vol. 1, Gulf Publishing Co., Houston, Texas, 1964.
W. L. O’Connell, How to attack air pollution control problems, Chem. Eng., Deskbook Issue, October 18 (1976).
J. H. Perry, Chemical Engineers’ Handbook, 3rd ed., McGraw-Hill, New York, 1950.
R. H. Perry, and C. H. Chilton, Chemical Engineers’ Handbook, 5th ed., McGraw-Hill, New York, 1973.
J. N. Peters, Predicting efficiency of fine-particle collectors, Chem. Eng., April 16 (1973).
G. D. Sargent, Dust collection equipment, Chem. Eng., January 27 (1969).
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© 1978 Plenum Press, New York
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Aerstin, F., Street, G. (1978). Gas-Solid Separations. In: Applied Chemical Process Design. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3976-2_8
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DOI: https://doi.org/10.1007/978-1-4613-3976-2_8
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