Improved correlation of liquid entrainment fraction in horizontal pipes

2022 ◽  
Vol 388 ◽  
pp. 111615
Author(s):  
Jaejin Lee ◽  
Tomasz Skorek ◽  
Markus Junk ◽  
Philipp Josef Schöffel
Keyword(s):  
Horizontal Pipes ◽  
Liquid Entrainment

Experimental Investigation of Liquid Entrainment in Gas in Horizontal Pipes

2009 ◽  
Author(s):  
I. Mantilla ◽  
L. Gomez ◽  
R. Mohan ◽  
O. Shoham ◽  
G. Kouba ◽  
...  
Keyword(s):  
Film Thickness ◽  
Liquid Film ◽  
Solution Viscosity ◽  
Gas Velocity ◽  
Flow Loop ◽  
Horizontal Pipes ◽  
Wave Characteristics ◽  
Liquid Entrainment ◽  
Wide Range ◽  
Superficial Gas Velocity

The objective of this project is to investigate experimentally the phenomena of liquid entrainment in gas in horizontal pipes. This report contains the results of an experimental study on wave characterization. Entrainment in annular flow in horizontal pipes has been studied experimentally. It has been found out that wave characteristics and entrainment fraction are strongly interrelated and must be utilized together in any related analysis. Two experimental facilities, 2-inch and 6-inch diameter, have been designed, constructed and utilized for entrainment measurements in stratified and annular horizontal flow. For the 2-inch flow loop, the range of superficial liquids velocities are 0.35 cm/s to 10 cm/s, and from 2 m/s to 80 m/s for the superficial gas velocities. For the 6-inch flow loop, the ranges of the superficial liquid velocities and superficial gas velocities are from 0.35 cm/s to 10 cm/s and from 2 m/s to 20 m/s, respectively. Appropriate instrumentation for entrainment (adjustable liquid film extractor) and liquid film characteristics (conductance probes and multi-channel conductivity meter) measurements have been developed and implemented. The effects of fluid properties on entrainment and wave characteristics have been studied by utilizing air-water-Butanol solution (surface tension effects) and air-water-Glycerin solution (viscosity effects). Simultaneous measurements have been carried out for both wave characteristics and entrainment for a wide range of flow conditions. Closure relationships have been developed based on the data for wave celerity, frequency, amplitude and spacing. The entrainment fraction has been normalized with the maximum entrainment fraction and correlated with the ratio of the superficial gas velocity to the superficial gas velocity at the onset. The wave amplitude (Δhw) normalized by the film thickness (hL) tends to values of Δhw / hL = 0.2 to 0.3 for high gas rates. The wave spacing (Lw) for air-water normalized by the mean film thickness (hL) exhibits a clear linear behavior with gas velocity, almost independent of the liquid velocity.

GAS-LIQUID FLOW-PATTERN TRANSITION IN HORIZONTAL PIPES – ANALYSIS OF REPORTED MODELS

2018 ◽  
Author(s):  
André Mendes Quintino ◽  
Davi Lotfi Lavor Navarro da Rocha ◽  
Oscar Mauricio Hernandez Rodriguez
Keyword(s):  
Flow Pattern ◽  
Liquid Flow ◽  
Horizontal Pipes ◽  
Flow Pattern Transition ◽  
Gas Liquid Flow

scholarly journals Response characteristics of conductance sensor and optimization of control-drive circuit in horizontal pipes

2019 ◽  
Vol 10 (1) ◽  
pp. 217-231
Author(s):  
He Li ◽  
Yongqiang Cui ◽  
Jun Li ◽  
Fengda Zhao ◽  
Weihang Kong ◽  
...  
Keyword(s):  
Horizontal Pipes ◽  
Response Characteristics ◽  
Drive Circuit

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.

Numerical simulation of dense-phase pneumatic transport of powder in horizontal pipes

2020 ◽  
Vol 361 ◽  
pp. 62-73 ◽  
Author(s):  
Zhen Miao ◽  
Shibo Kuang ◽  
Habib Zughbi ◽  
Aibing Yu
Keyword(s):  
Numerical Simulation ◽  
Pneumatic Transport ◽  
Dense Phase ◽  
Horizontal Pipes

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.

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