Drag Reduction of Gas-Liquid Two-Phase Flow in Steel Pipes with Different Inclination Geometry


Article Preview

It is significant to make researches on drag reduction in two-phase transport pipeline because two-phase flow has high energy dissipation. API X 52 steel pipe with diameter of 40mm is used in this paper to simulate pipeline with different inclination geometry including horizontal, up-inclined and vertical sections. The up-inclined section has an inclination angle of eight degree. Experiments and theoretical analysis are carried out to study the drag reduction characteristics of gas-liquid two-phase flow in these three sections. The drag reducing agents used here is polyacrylamide. It is found that two-phase drag reduction varies with pipe inclination geometry. The largest drag reduction efficiency occurs in horizontal pipes and which is up to seventy percent. Drag reduction efficiency in up-inclined section is up to sixty percent. Drag reduction in vertical section is the lowest and which can be up to about thirty percent. A mechanistic drag reduction model is proposed to predict drag reduction in gas-liquid two-phase flow. The results predicted are in good agreement with the experiment data.



Advanced Materials Research (Volumes 433-440)

Edited by:

Cai Suo Zhang




L. Liu et al., "Drag Reduction of Gas-Liquid Two-Phase Flow in Steel Pipes with Different Inclination Geometry", Advanced Materials Research, Vols. 433-440, pp. 463-470, 2012

Online since:

January 2012




[1] Toms B A. Some Obervations on the Flow of Linear Polymer Solutions through Straight Tubes at Large Reynolds Numbers. Pro 1st International Congress on Rheology, Amsterdam. North Holland, pp.135-138, (1948).

[2] Fernandes RL J, Jutte B M, Rodriguez M G. Drag reduction in horizontal annular two-phase flow. International Journal of Multiphase Flow, vol. 30(9), pp.1051-1069, (2004).

DOI: https://doi.org/10.1016/j.ijmultiphaseflow.2004.05.011

[3] Mowla D and Naderi A. Experimental study of drag reduction by a polymeric additive in slug two-phase flow of crude oil and air in horizontal pipes. Chemical Engineering Science, 2006, vol. 61, pp.1549-1554, (2006).

DOI: https://doi.org/10.1016/j.ces.2005.09.006

[4] Virk P S. Drag reduction fundamentals. AIChE Journal, vol. 21, pp.625-656, (1975).

DOI: https://doi.org/10.1002/aic.690210402

[5] Al Sarkhi A, Hanratty T J. Effect of drag-reducing polymers on annular gas-liquid flow in horizontal pipe. International Journal of Multiphase Flow, vol. 27, pp.1151-1162, (2001).

DOI: https://doi.org/10.1016/s0301-9322(00)00071-9