Improved closure models for gas entrainment and interfacial shear for slug flow modelling in horizontal pipes

2006 ◽  
Vol 32 (10-11) ◽  
pp. 1287-1293 ◽  
Author(s):  
R.I. Issa ◽  
M. Bonizzi ◽  
S. Barbeau
Keyword(s):  
Slug Flow ◽  
Interfacial Shear ◽  
Horizontal Pipes ◽  
Gas Entrainment ◽  
Flow Modelling ◽  
Closure Models

EXPERIMENTAL AND ANALYTICAL STUDIES OF GAS ENTRAINMENT PHENOMENA IN SLUG FLOW IN HORIZONTAL AND NEAR HORIZONTAL PIPES

2005 ◽  
Vol 17 (1-2) ◽  
pp. 147-168 ◽  
Author(s):  
C. P. Hale ◽  
Geoffrey F. Hewitt ◽  
I. G. Manolis ◽  
M. A. Mendes ◽  
S.M. Richardson ◽  
...  
Keyword(s):  
Slug Flow ◽  
Horizontal Pipes ◽  
Gas Entrainment ◽  
Analytical Studies

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

Processes ◽  
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.

A gas entrainment model for hydraulic jumps in near horizontal pipes

2012 ◽  
Vol 43 ◽  
pp. 39-55 ◽  
Author(s):  
R. Skartlien ◽  
J.A. Julshamn ◽  
C.J. Lawrence ◽  
L. Liu
Keyword(s):  
Hydraulic Jumps ◽  
Horizontal Pipes ◽  
Gas Entrainment

Initiation and Statistical Evolution of Horizontal Slug Flow With a Two-Fluid Model

2013 ◽  
Vol 135 (12) ◽  
Author(s):  
A. O. Nieckele ◽  
J. N. E. Carneiro ◽  
R. C. Chucuya ◽  
J. H. P. Azevedo
Keyword(s):  
Experimental Data ◽  
Slug Flow ◽  
Fluid Model ◽  
Subsequent Development ◽  
Complex Flow ◽  
Horizontal Pipes ◽  
Dimensional Version ◽  
Two Fluid Model ◽  
Log Normal ◽  
Two Fluid

In the present work, the onset and subsequent development of slug flow in horizontal pipes is investigated by solving the transient one-dimensional version of the two-fluid model in a high resolution mesh using a finite volume technique. The methodology (named slug-capturing) was proposed before in the literature and the present work represents a confirmation of its applicability in predicting this very complex flow regime. Further, different configurations are analyzed here and comparisons are performed against different sets of experimental data. Predictions for mean slug variables were in good agreement with experimental data. Additionally, focus is given to the statistical properties of slug flows such as shapes of probability density functions of slug lengths (which were represented by gamma and log-normal distributions) as well as the evolution of the first statistical moments, which were shown to be well reproduced by the methodology.

A Physical Model for Predicting the Pressure Drop of Gas-Liquid Slug Flow in Horizontal Pipes

2007 ◽  
Vol 19 (6) ◽  
pp. 736-742 ◽  
Author(s):  
Guo-zhen Li ◽  
Yue-dong Yao ◽  
Shou-ping Dong
Keyword(s):  
Pressure Drop ◽  
Physical Model ◽  
Slug Flow ◽  
Liquid Slug ◽  
Horizontal Pipes

Experimental Determination of Hydrodynamic Parameters of Air-Water Two-Phase Slug Flow in Horizontal Pipes

2012 ◽  
Author(s):  
Carlos H. Romero ◽  
María A. Márquez ◽  
Sissi D. Vergara ◽  
María T. Valecillos
Keyword(s):  
Slug Flow ◽  
High Speed ◽  
Electronic Device ◽  
Water System ◽  
Superficial Velocity ◽  
Two Phase ◽  
Horizontal Pipes ◽  
Type Pattern ◽  
Elongated Bubble

Two phase slug flow is the most common flow pattern for horizontal and near-horizontal pipelines. This study is designed to determine experimental velocities of elongated bubbles, lengths of liquid slugs and elongated bubbles, and slug frequencies for twenty flow rates combinations of a two phase air-water system that belong to a slug type pattern in horizontal pipes with a non invasive electronic device made of Photo-diodes (emitter) and photo-transistors (receiver) in a non visible length wave of 940 nanometers. The non intrusive electronic device is validated by simultaneously taking pictures with a high speed camera, (Kodak model Ektapro 4540 mx Imager, at shooting speed of 4500 frames per second, the picture resolution is 256 × 256 pixels), through a visualization cell filled with glycerin. This work is done with acrylic pipes of 0,03175 m inner diameter, to ensure complete flow development, the pictures are taken from a visualization cell located at a x/D = 249, the electronic device is located at x/D = 250. Air superficial velocity ranged between 0.156 and 0.468 m/s while water superficial velocity ranged between 0.159 and 1.264m/s. It is found that the non intrusive electronic device formed by photo diodes and photo transistors is an accurate technique that can be used in the determination of elongated bubble velocities, lengths and slug frequencies.

Gas Bubble Distribution in Liquid Slug of Horizontal Air-Water Flow

2011 ◽  
Vol 233-235 ◽  
pp. 2926-2929
Author(s):  
Xin Wang ◽  
Tong Ji Wang ◽  
Li Min He
Keyword(s):  
Slug Flow ◽  
Petroleum Industry ◽  
Turbulent Shear ◽  
Gas Bubble ◽  
Liquid Slug ◽  
Turbulent Shear Layer ◽  
Gas Entrainment ◽  
Bubble Distribution ◽  
Turbulent Shear Stress ◽  
Small Bubbles

The slug flow regime may be appeared in subsea gas-liquid pipeline of the offshore petroleum industry. The gas entrainment process and the gas bubble distribution in liquid slug are crucial for the model of slug flow. An experimental facility was constructed and the gas bubble distributions in the liquid slug were measured by the dual-tip conductivity probe. It is found that the entrained gas is broken up into small bubbles by the high turbulent shear stress in the turbulent shear layer in the mixing zone. The small bubbles are dispersed completely and the profiles of void fraction and bubble frequency have peaks in this layer. The mechanism of gas entrainment is also presented.

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