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A Study of Two‐Phase Co‐current Flow in Inclined Pipe
Author(s) -
Spedding P. L.,
Ferguson M. E. G.,
Watterson J. K.
Publication year - 1999
Publication title -
developments in chemical engineering and mineral processing
Language(s) - English
Resource type - Journals
eISSN - 1932-2143
pISSN - 0969-1855
DOI - 10.1002/apj.5500070113
Subject(s) - mechanics , pressure drop , flow (mathematics) , ripple , slug flow , two phase flow , stratified flow , geology , meteorology , geotechnical engineering , simulation , mathematics , environmental science , engineering , thermodynamics , physics , turbulence , power (physics)
Data are presented on horizontal and slightly inclined flows at +5 0 and ‐5 0 for a cocurrent air‐water system in α 0.0508 m i.d. pipe. The predictive ability of existing flow regimes maps were shown to be inadequate. New maps were proposed for horizontal and slightly inclined up and downward flow. Several transitional criteria were shown to be useful in prediction for horizontal flow. Both liquid holdup and pressure drop characteristics for inclined flows were different either side of a superficial gas velocity of 10 m s −1 . Below this value upward flow had the greatest pressure loss and horizontal flow the least. Above the 10 m s −1 the opposite was the case. For holdup; V sg < 10 m s −1 led to down flow having the lowest value but for V sg > 10 m s −1 the horizontal condition had the lowest value. Upflow always possessed the highest liquid hold‐up value. The Olujic [80] and Spedding‐Hand [71] models were successful in predicting most flow regimes for horizontal flow except stratified ripple and blow‐through‐slug, annular droplet and the intermittent regimes. The inclined flows proved more difficult to predict.