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Existence of slug flow in vertical co-current two-phase flow

Authors
D. Roullier (The University of Tulsa) | H. Karami (The University of Tulsa) | E. Pereyra (The University of Tulsa) | C. Sarica (The University of Tulsa)
Document ID
BHR-2018-203
Publisher
BHR Group
Source
11th North American Conference on Multiphase Production Technology, 6-8 June, Banff, Canada
Publication Date
2018
Document Type
Conference Paper
Language
English
Copyright
2018. BHR Group 2018 Multiphase 11
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Price: USD 20.00

ABSTRACT

This study investigates experimentally and theoretically the existence slugs for vertical co-current two-phase flow in large diameter vertical tubing and risers. The slug flow pattern implies the presence of Taylor bubbles separated by hydraulically sealed liquid slugs. Previous experimental studies such as Ombere-Ayari and Azzopardi (2007) [1] showed evidence of the non-existence of Taylor bubbles for large diameter pipes. Models developed to predict this experimental behaviour (Kocamustafaogullari et al., 1984 [2]; Jayanti and Hewitt [3], 1990 and Kjølaas et al., 2017 [4]) suggest that Taylor bubbles may disappear at large diameters and/or high velocities. However, the previously proposed models do not properly account for the simultaneous effect of velocity and diameter on the stability of a Taylor bubble.

File Size  2 MBNumber of Pages   16

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