Modeling and simulation of severe slugging in air–water pipeline–riser systems

A mathematical model, numerical simulations and stability and flow regime maps corresponding to severe slugging in pipeline–riser systems, are presented. In the simulations air and water were used as flowing fluids. The mathematical model considers continuity equations for liquid and gas phases, wit...

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Bibliographic Details
Published in:	International journal of multiphase flow Vol. 36; no. 8; pp. 643 - 660
Main Authors:	Baliño, J.L., Burr, K.P., Nemoto, R.H.
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier Ltd 01-08-2010 Elsevier
Subjects:	Air–water flow Applied sciences Computer simulation Crude oil, natural gas and petroleum products Crude oil, natural gas, oil shales producing equipements and methods Energy Exact sciences and technology Fuels Liquids Mathematical models Multiphase flow Oil extraction from wells. Pumping. Shale oil extraction. Well workover Petroleum production technology Pipeline–riser system Position (location) Prospecting and production of crude oil, natural gas, oil shales and tar sands Risers Severe slugging Stability Pipeline–riser system Petroleum production technology Stability Severe slugging Air–water flow Two phase flow Slugging Air water interface Modeling Pipeline Oil industry Flow regime Pipeline-riser system Numerical simulation Riser Slug flow Air-water flow
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Summary:	A mathematical model, numerical simulations and stability and flow regime maps corresponding to severe slugging in pipeline–riser systems, are presented. In the simulations air and water were used as flowing fluids. The mathematical model considers continuity equations for liquid and gas phases, with a simplified momentum equation for the mixture, neglecting inertia. A drift-flux model, evaluated for the local conditions in the riser, is used as a closure law. The developed model predicts the location of the liquid accumulation front in the pipeline and the liquid level in the riser, so it is possible to determine which type of severe slugging occurs in the system. The numerical procedure is convergent for different nodalizations. A comparison is made with experimental results corresponding to a catenary riser, showing very good results for slugging cycle and stability and flow regime maps.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0301-9322 1879-3533
DOI:	10.1016/j.ijmultiphaseflow.2010.04.003