Application of the principles of gas permeability and stochastic particle agitation to predict the pressure loss in slug flow pneumatic conveying systems

2014 ◽  
Vol 254 ◽  
pp. 508-516 ◽  
Author(s):  
I. Lecreps ◽  
O. Orozovic ◽  
M.G. Jones ◽  
K. Sommer
Keyword(s):  
Slug Flow ◽  
Pressure Loss ◽  
Gas Permeability ◽  
Pneumatic Conveying ◽  
Stochastic Particle

On the kinematics of horizontal slug flow pneumatic conveying and the relationship between slug length, porosity, velocities and stationary layers

2019 ◽  
Vol 351 ◽  
pp. 84-91 ◽  
Author(s):  
O. Orozovic ◽  
A. Lavrinec ◽  
Y. Alkassar ◽  
K. Williams ◽  
M.G. Jones ◽  
...  
Keyword(s):  
Slug Flow ◽  
Pneumatic Conveying ◽  
The Relationship

scholarly journals Optimization and Extended Applicability of Simplified Slug Flow Model for Liquid-Gas Flow in Horizontal and Near Horizontal Pipes

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 842
Author(s):  
Tea-Woo Kim ◽  
Nam-Sub Woo ◽  
Sang-Mok Han ◽  
Young-Ju Kim
Keyword(s):  
Slug Flow ◽  
Pressure Loss ◽  
Gas Flow ◽  
Flow Model ◽  
Flow Coefficient ◽  
Coefficient Of Determination ◽  
Liquid Holdup ◽  
Two Phase ◽  
Horizontal Pipes ◽  
Image Velocimetry

The accurate prediction of pressure loss for two-phase slug flow in pipes with a simple and powerful methodology has been desired. The calculation of pressure loss has generally been performed by complicated mechanistic models, most of which require the iteration of many variables. The objective of this study is to optimize the previously proposed simplified slug flow model for horizontal pipes, extending the applicability to turbulent flow conditions, i.e., high mixture Reynolds number and near horizontal pipes. The velocity field previously measured by particle image velocimetry further supports the suggested slug flow model which neglects the pressure loss in the liquid film region. A suitable prediction of slug characteristics such as slug liquid holdup and translational velocity (or flow coefficient) is required to advance the accuracy of calculated pressure loss. Therefore, the proper correlations of slug liquid holdup, flow coefficient, and friction factor are identified and utilized to calculate the pressure gradient for horizontal and near horizontal pipes. The optimized model presents a fair agreement with 2191 existing experimental data (0.001 ≤ μL ≤ 0.995 Pa∙s, 7 ≤ ReM ≤ 227,007 and −9 ≤ θ ≤ 9), showing −3% and 0.991 as values of the average relative error and the coefficient of determination, respectively.

G050056 Void Fraction and Frictional Pressure Loss in Gas-Liquid Two-Phase Slug Flow in a Micro Tube

2011 ◽  
Vol 2011 (0) ◽  
pp. _G050056-1-_G050056-5
Author(s):  
Hisato MINAGAWA ◽  
Takahiro YASUDA ◽  
Shingo SUGIMOTO
Keyword(s):  
Void Fraction ◽  
Slug Flow ◽  
Pressure Loss ◽  
Two Phase

Solids deposition in low-velocity slug flow pneumatic conveying

2005 ◽  
Vol 44 (2) ◽  
pp. 167-173 ◽  
Author(s):  
J. Li ◽  
C. Webb ◽  
S.S. Pandiella ◽  
G.M. Campbell ◽  
T. Dyakowski ◽  
...  
Keyword(s):  
Slug Flow ◽  
Pneumatic Conveying ◽  
Low Velocity ◽  
Solids Deposition

Insights into horizontal slug flow pneumatic conveying from layer fraction and slug velocity measurements

2020 ◽  
Vol 364 ◽  
pp. 218-228 ◽  
Author(s):  
O. Orozovic ◽  
A. Lavrinec ◽  
Y. Alkassar ◽  
J. Chen ◽  
K. Williams ◽  
...  
Keyword(s):  
Slug Flow ◽  
Pneumatic Conveying ◽  
Velocity Measurements

Analysis of Low Velocity Dense Phase Pneumatic Conveying System to Extend System Conveying Capability

2011 ◽  
Vol 239-242 ◽  
pp. 112-115
Author(s):  
Sheng Ming Tan ◽  
Bin Chen ◽  
Kenneth Charles Williams ◽  
Mark Glynne Jones
Keyword(s):  
Slug Flow ◽  
Pneumatic Conveying ◽  
Dense Phase ◽  
Bulk Materials ◽  
Air Velocity ◽  
Low Velocity ◽  
Lower Velocity ◽  
Pipe Line ◽  
Conveying System ◽  
Velocity Zone

This paper reports the current development of technologies to analyse the conveying performance of bypass low velocity dense phase pneumatic conveying system for transporting powder bulk materials and slug flow low velocity dense phase pneumatic conveying system for transporting granular sized bulk materials. It reveals that the bypass system can be operated at a lowered air velocity than conventional pipe line and slug flow system can be also controlled to operate at a lower velocity zone. Hence these technologies have the potential to extend the conveying capability of a pneumatic conveying system to a broader range of materials, also provide better performance in reduction in pipe wear and product degradation.

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