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Drag Reduction in Two‐phase Gas‐Liquid flow
Author(s) -
Ferguson M. E. G.,
Spedding P. L.
Publication year - 1996
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.5500040304
Subject(s) - drag , stratified flow , two phase flow , mechanics , flow (mathematics) , parasitic drag , bubble , drag coefficient , phase (matter) , materials science , aerodynamic drag , ripple , physics , thermodynamics , turbulence , power (physics) , quantum mechanics
Drag reduction is reported for two phase air water liquid co‐current flow for three different pipe diameters (0.0454, 0.0508, 0.0935 m). The drag reduction was achieved without the addition of drag reducing agents such as surfactants. Drag reduction compared to single phase gas flow occurred in the stratified and the stratified plus ripple regimes and in the droplet and the stratified film plus droplet regimes at low liquid flow rates. Drag reduction compared to single phase liquid flow occurred in the stratified and the stratified roll wave and inertial wave and the bubble flow regimes at relatively low gas flows. Details of the mechanisms involved are presented.