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Hydrodynamics of a flowing gas‐solids suspension in a tube at high angles of inclination
Author(s) -
Ginestet A.,
Guigon P.,
Large J. F.,
Sen Gupta S.,
Beeckmans J. M.
Publication year - 1993
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450710202
Subject(s) - pressure drop , tube (container) , mechanics , flux (metallurgy) , suspension (topology) , materials science , drop (telecommunication) , plane (geometry) , chemistry , composite material , physics , geometry , telecommunications , mathematics , homotopy , computer science , pure mathematics , metallurgy
A study was made of pneumatic transport of particles of sand suspended in air in a 31.8 mm diameter Plexiglas tube inclined at either 72 or 90 degrees with respect to the horizontal plane. The solids holdup, pressure gradient and pressure drop fluctuations over a 4.55 m test section were measured as functions of the air velocity and the solids flux. Previously observed sudden changes in slope of plots of solids holdup versus solids flux at constant gas velocity in a vertical tube (Mok et al., 1989), which were identified as transition points between dilute and dense phases, were confirmed and extended to inclined tubes. Breaks were also found in plots of pressure drop fluctuations versus solids flux at constant gas velocity.