scholarly journals Statistical characterization of two-phase slug flow in a horizontal pipe

Author(s):  
J. N. E. Carneiro ◽  
R. Fonseca Jr. ◽  
A. J. Ortega ◽  
R. C. Chucuya ◽  
A. O. Nieckele ◽  
...  
Author(s):  
Afshin Goharzadeh ◽  
Peter Rodgers

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.


2015 ◽  
Vol 16 (3) ◽  
pp. 307 ◽  
Author(s):  
I. Belgacem ◽  
Y. Salhi ◽  
M. Hammoudi ◽  
E.K. Si-Ahmed ◽  
J. Legrand

1996 ◽  
Vol 22 (4) ◽  
pp. 783-796 ◽  
Author(s):  
A. Paglianti ◽  
M. Giona ◽  
A. Soldati
Keyword(s):  

2020 ◽  
Author(s):  
Carla Nayara Michels dos Santos ◽  
Sarah Laysa Becker ◽  
Vinícius Basso de Godoy ◽  
Celso Murilo dos Santos ◽  
Henry França Meier ◽  
...  

Author(s):  
Stefan Wenzel ◽  
Marek Czapp ◽  
Thomas Sattelmayer

Numerical as well as experimental investigations of the highly intermittent slug flow regime of a gas-liquid mixture in horizontal pipes are of particular interest for nuclear reactor safety in post loss-of-coolant accident (LOCA) situations. The strong variation of governing interfacial length scales, as they are characterizing the slug flow regime, pushes common numerical multi-phase approaches to their limits, since they are designed either for interface capturing or for modeling the sub-grid behavior of the dispersed mixture. In this work an enhanced hybrid two-phase flow solver is employed to investigate the global and local characteristics of adiabatic, horizontal slug flows in a water-air system. A dynamic switching algorithm for an interface capturing procedure is introduced to examine segregated and dispersed parts in the same flow domain. The inter-facial area transport equation (IATE) is used to detect dispersed flow regions as well as to determine variable bubble sizes and their distribution within the slug body. Experimental results of videometry measurements on a horizontal, 10 m long pipe with an inner diameter of 54 mm at atmospheric pressure and room temperature are compared with numerical results of the same geometry in terms of global characteristics such as slug frequency and onset position. Local properties, such as the interfacial area density in the slug body, are also examined. This study demonstrates the capability of a coupled multiscale approach based on the Euler-Euler two-fluid model (TFM) for the simulation of slug flow in horizontal pipes with a high amount of entrainment.


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