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Calculation of critical velocities to maintain solids in suspension in horizontal pipes

✍ Scribed by J.T. Davies

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
367 KB
Volume
42
Category
Article
ISSN
0009-2509

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✦ Synopsis

simple theoretical justification of the empirica results for the flow velocities required just to suspend solid particles in horizontal pipes is deduced from turbulence theory. The new theoretical equation gives a better fit to the empirical data than does the Durand relation: it explains the maximum veIocity often found at a solids concentration of 0.15 and it also predicts a velocity dependence on dtl*, close to the mean empirical dependence on dp.. . ' " The sedimentation behaviour of the particles is exammed in relation to the lifting velocities of various sizes of eddies, to explain the observed behaviour.

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