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CFD Multi-Phase Flow Analysis Across Diverging Manifolds: Application in the Oil-Gas Industry

[+] Author Affiliations
Sergio Croquer, Joaquin Vieiro, Miguel Asuaje

Universidad Simon Bolivar, Sartenejas, Venezuela

Carlos Chacon

Universidad Simon Bolivar - Litoral, Camuri, Venezuela

Paper No. IMECE2014-36681, pp. V007T09A075; 10 pages
doi:10.1115/IMECE2014-36681
From:
  • ASME 2014 International Mechanical Engineering Congress and Exposition
  • Volume 7: Fluids Engineering Systems and Technologies
  • Montreal, Quebec, Canada, November 14–20, 2014
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4954-5
  • Copyright © 2014 by ASME

abstract

This investigation assessed detailed characteristics of flow in diverging manifolds, for water and water-oil cases. A 3D Computational Fluid Dynamics (CFD) model of a distributing manifold was carried out. Numerical results showed good agreement with experimental values. Predicted pressure and velocity contours agree with theory, detailed 3D insight on present secondary flows and localized hydraulic losses was obtained, as well as effect on distribution of phases. Moreover, a 3D, multi-phase (oil-water) CFD model of a diverging manifold design, similar to those installed in separation units was conducted. The main pipe had 0.762 m (30 in) in diameter and 24 m in length, with 8 perforated pipes branching out. Branches had 0.305 m (12 in) in diameter and 12 m in length, with 312 holes per branch. Non-uniform outflow distributions were detected, as well as secondary flows. An alternate design was proposed. Numerical results show the new manifold design achieves uniform static pressure distribution across the entire main pipe, reducing secondary flows and hydraulic losses. Outflow distribution is also uniform, thus improving the performance of the separation unit.

Copyright © 2014 by ASME

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