Ribeiro, J.X.F.; Liao, R.; Aliyu, A.M.; Ahmed, S.K.B.; Baba, Y.D.; Almabrok, A.A.; Archibong-Eso, A.; Liu, Z. A Two-Fluid Model for High-Viscosity Upward Annular Flow in Vertical Pipes. Energies2021, 14, 3485.
Ribeiro, J.X.F.; Liao, R.; Aliyu, A.M.; Ahmed, S.K.B.; Baba, Y.D.; Almabrok, A.A.; Archibong-Eso, A.; Liu, Z. A Two-Fluid Model for High-Viscosity Upward Annular Flow in Vertical Pipes. Energies 2021, 14, 3485.
Selection of appropriate friction factors is paramount for accurate prediction of key flow characteristics in gas–liquid two-phase flows. In this work, experimental investigation of vertical air and oil (with viscosities up to 200 mPa s) flow in a 0.060-m ID pipe is reported. Superficial air and oil velocity ranges utilized are from 22.37 to 59.06 m/s and 0.05 to 0.16 m/s respectively. The influence of estimation of interfacial friction factor on accurate determination of film thickness, void fraction and pressure gradient was investigated using a two-fluid model. The results indicated that the two-fluid model is capable of accurately predicting flow characteristics. Further, it reveals that the best performing correlations are the Belt et al. and Ambrosini et al. correlations.
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.