Correction to: Study of high viscous multiphase flow in a horizontal pipe

Baba, Yahaya D.; Aliyu, Aliyu M.; Archibong-Eso, Archibong; Almabrok, Almabrok A.; Igbafe, Anselm I.

doi:10.1007/s00231-017-2218-x

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“…As can be seen, the studies of Gregory and Scott [15], Mattar and Gregory [16], Dukler and Hubbard [17], Nicholson et al [18], Dukler et al [19], and Kouba and Jepson [20], all proposed correlations of the Nicklin [14] type, mainly based on superficial velocities, and do not have a liquid viscosity term embedded. However, only few existing [9,12,[21][22][23] have indicated that the fluid properties such as the liquid viscosity have significant effects on slug translational velocity. It was noted by these studies that slug translational velocity increases as liquid viscosity increases.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Furthermore, the current authors [10][11][12][13] conducted experiments using high viscosity oils ranging from 0.6 to 7.0 Pa•s and gas in both horizontal and inclined experimental test facility with internal diameter of 0.025-m and 0.0762-m located within the Oil and Gas Engineering Centre at Cranfield University. Their investigations noted very significant effects of high liquid viscosity on two phase flows on slug frequency, holdup, length and translational velocities.…”

Section: Introductionmentioning

confidence: 99%

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Slug Translational Velocity for Highly Viscous Oil and Gas Flows in Horizontal Pipes

Baba

Archibong-Eso

Aliyu

et al. 2019

Fluids

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Slug translational velocity, described as the velocity of slug units, is the summation of the maximum mixture velocity in the slug body and the drift velocity. Existing prediction models in literature were developed based on observation from low viscosity liquids, neglecting the effects of fluid properties (i.e., viscosity). However, slug translational velocity is expected to be affected by the fluid viscosity. Here, we investigate the influence of high liquid viscosity on slug translational velocity in a horizontal pipeline of 76.2-mm internal diameter. Air and mineral oil with viscosities within the range of 1.0–5.5 Pa·s were used in this investigation. Measurement was by means of a pair of gamma densitometer with fast sampling frequencies (up to 250 Hz). The results obtained show that slug translational velocity increases with increase in liquid viscosity. Existing slug translational velocity prediction models in literature were assessed based on the present high viscosity data for which statistical analysis revealed discrepancies. In view of this, a new empirical correlation for the calculation of slug translational velocity in highly viscous two-phase flow is proposed. A comparison study and validation of the new correlation showed an improved prediction performance.

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