Journal
POWDER TECHNOLOGY
Volume 160, Issue 2, Pages 103-113Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.powtec.2005.08.009
Keywords
pickup velocity; critical velocity; pneumatic conveying; particle shape
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This work presents experimental results on pickup velocity (critical velocity) measurements for a variety of particulate solids. The present experiments together with previously published experiments of a number of researchers encompass about 100 measurements of 24 materials for a wide range of particle sizes, shapes and densities. Based on the experimental results, three zones are defined by establishing simple relationships between the Reynolds and Archimedes numbers. The empirical relationships were further modified by taking into account the pipe diameter and particle shape (sphericity). The three-zone model was shown to reasonably correlate to Geldart's classification groups. (c) 2005 Published by Elsevier B.V.
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