@ARTICLE{Nyong_Oku_Ekpenyong_Numerical_2023,
 author={Nyong, Oku Ekpenyong and Igbong, Dodeye Ina and Ebieto, Celestine Ebieto and Ekpo Ene, Bassey and Oluwadare, Benjamin and Archibong Eso, Archibong},
 volume={vol. 44},
 number={No 4},
 journal={Archives of Thermodynamics},
 pages={705-731},
 howpublished={online},
 year={2023},
 publisher={The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences},
 abstract={Chemical, petroleum and nuclear systems are only a few of the industrial processes that utilize gas-liquid flow in annular closed channels. However, concentric horizontal annuli flow patterns have received little attention. The ability to precisely characterize two-phase flow patterns using computational techniques is crucial for the production, transportation, and optimization of designs. This current research aims to establish the accuracy of the computational fluid dynamics (CFD) model in predicting the gas-liquid flow pattern in the concentric annulus pipe and validating the flow pattern of liquid holdup with experimental results from the literature. The simulations were done on a test section of a 12.8 m length pipe with a hydraulic diameter of 0.0168 m using air and water as the working fluids. The volume of fluid (VOF) model in Ansys Fluent based on the Eulerian- Eulerian approach in conjunction with the realizable k-ε turbulence model was used to model the gas-liquid flow pattern, i.e. dispersed bubble, elongated bubble, and slug in a horizontal annulus. A comparison of the model with the experimental high-speed video images shows a reasonable agreement for the flow pattern and liquid holdup data.},
 type={Article},
 title={Numerical simulation of two-phase gas-liquid flowthrough horizontal annulus pipe},
 URL={http://www.journals.pan.pl/Content/131168/PDF/art31.pdf},
 doi={10.24425/ather.2023.150105},
 keywords={elongated bubble flow, gas-liquid two-phase flow, liquid holdup, PDF, annulus pipe, CFD modelling},
}