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Title: Inception and termination of the core-annular flow pattern for oil-water downflow through a vertical pipe
Authors: Ghosh, Sumana
Das G.
Das P.K.
Published in: AIChE Journal
Abstract: Different flow patterns for lube oil-water and for kerosene-water downflow through a vertical glass tube have been analyzed with the help of flow visualization. Core-annular flow is the dominant flow regime, with oil forming the core, and water is forming the wall film. When the velocities are increased, transition to slug flow and transition to dispersed flow are found. The waves found during the transition to slug flow depend on oil viscosity: axisymmetric bamboo waves are seen in kerosene-water downflow and the waves are asymmetric in case of lube oil-water flow where they have a cork-screw shape. Based on the experimental observations, simple mathematical models have been proposed for predicting the flow pattern transition curves. © 2011 American Institute of Chemical Engineers.
Citation: AIChE Journal, 58(7): 2020-2029
Issue Date: 2012
Keywords: Annular flow
Flow regimes
Oil-water downflow
Transition criteria
ISSN: 11541
Author Scopus IDs: 57213865255
Author Affiliations: Ghosh, S., Dept. of Chemical Engineering, IIT Kharagpur, 721302, India
Das, G., Dept. of Chemical Engineering, IIT Kharagpur, 721302, India
Das, P.K., Dept. of Mechanical Engineering, IIT Kharagpur, 721302, India
Corresponding Author: Das, G.; Dept. of Chemical Engineering, , 721302, India; email:
Appears in Collections:Journal Publications [CH]

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