Stability Analysis of Two-Phase Slug Flow Using OpenFOAM

Two regions of instabilities in horizontal two-phase flow were detected. The first was found in the transition from slug to annular flow, the second between stratified and slug flow. The existence of oscillations between the slug and annular flows can explain the differences in the limitation of the slug flow in flow regime maps proposed by different authors. Coexistence of these two regimes is similar to bistable behaviour of some differential equation solutions.

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Rescaled range permutation entropy: a method for quantifying the dynamical complexity of gas–liquid two-phase slug flow

Nonlinear Dynamics ◽

10.1007/s11071-021-06468-2 ◽

2021 ◽

Author(s):

Weikai Ren ◽

Jiachen Zhang ◽

Ningde Jin

Keyword(s):

Slug Flow ◽

Permutation Entropy ◽

Two Phase ◽

Dynamical Complexity ◽

Rescaled Range

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Pressure drop and drag reduction in two-phase non-newtonian slug flow

The Canadian Journal of Chemical Engineering ◽

10.1002/cjce.5450540117 ◽

1976 ◽

Vol 54 (1-2) ◽

pp. 111-114 ◽

Cited By ~ 21

Author(s):

Lambert Otten ◽

Abdelrahman S. Fayed

Keyword(s):

Pressure Drop ◽

Drag Reduction ◽

Slug Flow ◽

Two Phase

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Research on the Dynamic Responses of Simply Supported Horizontal Pipes Conveying Gas-Liquid Two-Phase Slug Flow

Processes ◽

10.3390/pr9010083 ◽

2021 ◽

Vol 9 (1) ◽

pp. 83

Author(s):

Gang Liu ◽

Zongrui Hao ◽

Yueshe Wang ◽

Wanlong Ren

Keyword(s):

Slug Flow ◽

Peak Frequency ◽

Dynamic Responses ◽

Piping System ◽

Transverse Displacement ◽

Vibration Acceleration ◽

Two Phase ◽

Horizontal Pipes ◽

Simply Supported ◽

Superficial Gas Velocity

The dynamic responses of simply supported horizontal pipes conveying gas-liquid two-phase slug flow are explored. The intermittent characteristics of slug flow parameters are mainly considered to analyze the dynamic model of the piping system. The results show that the variations of the midpoint transverse displacement could vary from periodic-like motion to a kind of motion whose amplitude increases as time goes on if increasing the superficial gas velocity. Meanwhile, the dynamic responses have certain relations with the vibration acceleration. By analyzing the parameters in the power spectrum densities of vibration acceleration such as the number of predominant frequencies and the amplitude of each peak frequency, the dynamic behaviors of the piping system like periodicity could be calculated expediently.

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An Investigation of Two-Phase Slug Flow in Inclined Pipelines

Energy Sources ◽

10.1080/00908310490438614 ◽

2004 ◽

Vol 26 (7) ◽

pp. 627-638 ◽

Cited By ~ 2

Author(s):

SUAT BAGCI

Keyword(s):

Slug Flow ◽

Two Phase

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Experimental Characterization of Slug Flow Velocity Distribution in Two Phase Pipe Flow

Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C ◽

10.1115/imece2009-11201 ◽

2009 ◽

Cited By ~ 4

Author(s):

Afshin Goharzadeh ◽

Peter Rodgers

Keyword(s):

Velocity Distribution ◽

Slug Flow ◽

Two Phase ◽

Significant Drop ◽

Horizontal Pipe ◽

Measured Velocity ◽

Air Bubble ◽

Velocity Magnitude ◽

Index Matching ◽

Refractive Index Matching

This paper presents an experimental study of gas-liquid slug flow inside a horizontal pipe. The influence of air bubble passage on liquid flow is characterized using Particle Image Velocimetry (PIV) combined with Refractive Index Matching (RIM) and fluorescent tracers. A physical insight into the velocity distribution within slug flow is presented. It was observed that the slug flow significantly influences the velocity profile in the liquid film. Measured velocity distributions also revealed a significant drop in the velocity magnitude immediately upstream of the slug nose. These findings aim to aid an understanding of the mechanism of solid transportation in slug flows.

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