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Visualization and mathematical modelling of horizontal multiphase slug flow
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The article was published on 1994-01-01 and is currently open access. It has received 6 citations till now. The article focuses on the topics: Slug flow & Visualization.read more
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Prediction of the flow regime transitions in high pressure, large diameter, inclined multiphase pipelines
Abstract: WILKENS~ ROBERT, JOSEPH. Ph.D. June 1997 Chemical Engineering Prediction of the Flow Regime Transitions in High Pressure, Large Diameter, Inclined Multiphase Pipelines Director of Dissertation: W. Paul Jepson In multiphase flows, flow regime determination has many design applications such as boiler tubes and oil and gas pipelines. This study focuses on the oil production from older wells in which brine and carbon dioxide gas are commonly present in the pipelines. Often these oil~ water, and gas mixtures create a highly corrosive environment for typical carbon steel pipelines. Since the highest corrosion rate occurs in slug flow, the ability to predict this flow regime becomes of great importance. The transitions from stratified to slug and from slug to annular flow are not well understood. Further, little data is available for flows in large diameter, multiphase pipes which include the effects of pressure and inclination. For this purpose, oil/water/gas tests were conducted in a 9.72-cm diameter, 18-m long pipe at inclinations of 0, ±2, and ±5° and pressures of 0.27, 0.45, and 0.79 MPa. The ratio of the translational velocity to the superficial mixture velocity was found to be about 2.0 for plug flow, 1.2 for slug flow, and 0.5 1.2 for pseudo-slug flow. The film Froude number in slug flow was found to increase with increasing gas flow rate to a value of about 18. The value then dropped as pseudo-slug flow was achieved. It again increased with gas flow rate until it reached a value of about 16, then annular flow ensued.
Journal ArticleDOI
Liquid Holdup in Large-Diameter Horizontal Multiphase Pipelines
Lisa C. Maley,W. P. Jepson +1 more
TL;DR: In this article, the authors studied the liquid holdup within the mixing zone of the slug and found that the holdup of the liquid film before the slug increases linearly with the film Froude number and is independent of the viscosity of liquid in the slug.
Studies of Multiphase Flow in High Pressure Horizontal and +5 Degree Inclined Pipelines
R.J. Wilkens,W. Paul Jepson +1 more
TL;DR: In this paper, an 18-m long, 9.7 cm diameter stainless steel pipeline has been used for the study of multiphase flow and its subsequent effects upon corrosion.