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General Information
    • ISSN: 1793-8198 (Print)
    • Abbreviated Title: Int. J. Mater. Mech. Manuf.
    • Frequency: Bimonthly
    • DOI: 10.18178/IJMMM
    • Editor-in-Chief: Prof. Ian McAndrew
    • Co-editor-in-Chief: Prof. K. M. Gupta
    • Executive Editor: Cherry L. Chen
    • Abstracting/Indexing: Inspec (IET), Chemical Abstracts Services (CAS),  ProQuest, Crossref, Ulrich's Periodicals Directory,  EBSCO.
    • E-mail ijmmm@ejournal.net

Prof. Ian McAndrew
Capitol Technology University, USA
It is my honor to be the editor-in-chief of IJMMM. I will do my best to work with the editorial team and help make this journal better.

IJMMM 2020 Vol.8(3): 94-103 ISSN: 1793-8198
DOI: 10.18178/ijmmm.2020.8.3.490

Numerical Simulation of Two-Phase Slug Flow Liquid-Carryover in a Converging T-junction

Minh Cong Tran, Hai Anh Nguyen, and Dat Tien Nguyen
Abstract—In the offshore platform, T-junction has been extensively used as preliminary gas-liquid separator due to its compact design. Frequently, a sudden slug generation causes liquid carryover issues leading to excessive liquid in the gas feed for downstream equipment. Geometry features of T-junction and slug flow are believed to be the root cause of this problem. Based on the literature review, previous works mostly focused on improving two-phase separation in the standard T-junctions without taking into account the impact of inlet flow regime. Moreover, there is no published research on the separation performance of converging T-junction, which is a promising design. The objective of this research is to numerically evaluate the hypothesis that converging T-junction yields better phase separation under slug flow compared with regular and reduced T-junctions. Three-dimensional Computational Fluid Dynamics (CFD) software FLUENT 17.2 and specialized User Defined Functions was utilized to study the evolutionary process of air-water slug flow and its phase separation behavior in converging T-junctions over eight different geometry designs. The incompressible Volume of Fluid (VOF) method was used to capture the transient distribution of segregated gas-liquid interface. The validity of the present model was compared with the experimental data taken from the air-water two-phase flow in 3-inch diameter main pipe of T-junction. The validated model gave a strong foundation to proceed with converging T-junction simulation. The research found that the converging T-junction can increase by upto 20% of separation efficiency compared with regular and reduced T-junction at the same operating conditions. Moreover, the converging T-junction with the main and converging diameter ratio of 0.67 and 0.4, respectively, to be optimal in improving the phase separation over a wide spectrum of air and water superficial velocities.

Index Terms—Numerical simulation, slug flow, T-junction, two-phase separation.

The authors are with the Modeling and Simulation Center – Viettel High Technologies Corporation, Vietnam (Corresponding author: Minh Cong Tran, minhtc3@viettel.com.vn).


Cite: Minh Cong Tran, Hai Anh Nguyen, and Dat Tien Nguyen, "Numerical Simulation of Two-Phase Slug Flow Liquid-Carryover in a Converging T-junction," International Journal of Materials, Mechanics and Manufacturing vol. 8, no. 3, pp. 94-103, 2020.

Copyright © 2020 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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