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Cocurrent gas‐liquid flow in horizontal tubes with internal spiral ribs
Author(s) -
Zarnett G. D.,
Charles M. E.
Publication year - 1969
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.5450470314
Subject(s) - slug flow , spiral (railway) , mechanics , bubble , rib cage , flow (mathematics) , tube (container) , materials science , spark plug , geology , two phase flow , physics , thermodynamics , composite material , engineering , structural engineering , mechanical engineering
The flow of air‐liquid mixtures has been investigated in 3/4‐inch internal diameter Lucite tubes fitted with continuous spiral ribs having pitch‐to‐diameter ratios of 1.57 and 2.79. Descriptions and photographs of the flow patterns are presented for reasonably wide ranges of gas and liquid flow rates. The main effect of the spiral rib was to move the gas phase away from the tube walls. The flow patterns were classified as bubble, plug, slug‐stratified, slug‐semiannular and slug‐annular. The pressure gradient data were successfully correlated with the Lockhart‐Martinelli parameters, although the resulting curves showed small displacements from the Lockhart‐Martinelli correlation for smooth tubes.