Effect of Particle Size on Pipeline Flow of Solid-Liquid Slurry With Fixed Particle Size Distribution

2002 ◽  
Author(s):  
P. V. Skudarnov ◽  
M. Daas ◽  
C. X. Lin ◽  
M. A. Ebadian ◽  
P. W. Gibbons ◽  
...  
Keyword(s):  
Particle Size ◽  
Pressure Drop ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Deposition Velocity ◽  
Single Species ◽  
Flow Loop ◽  
Pipeline Flow ◽  
Liquid Slurry ◽  
Solid Liquid

The transport properties of solid-liquid slurries having the same well-defined particle size distribution but different median particle sizes have been studied in a 22-mm I.D. horizontal pipeline flow loop. The solid-liquid slurries were glass beads-water mixtures. The particle size distribution of solids was Rosin-Rammler with median diameters of 50 mm and 250 mm. The relationship between the pressure drop in the straight horizontal sections of the flow loop and the mean slurry velocity was determined for different solids volume concentrations varying from 4.5 to 25% and mean slurry velocity ranging from 0.5 to 2.5 m/s. Critical deposition velocity was measured from visual observations. An existing empirical model of Wasp et al. that predicts the pressure gradient for a single-species slurry flow in a horizontal pipeline was used to describe the pressure drop data. The Oroskar-Turian correlation for critical velocity was used for comparison with the measured critical velocities.

Transport Characteristics of a Multi-Species Slurry in a Horizontal Pipeline

2001 ◽  
Author(s):  
P. V. Skudarnov ◽  
H. J. Kang ◽  
C. X. Lin ◽  
M. A. Ebadian ◽  
P. W. Gibbons ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Deposition Velocity ◽  
Single Species ◽  
Operating Conditions ◽  
High Level Waste ◽  
Slurry Flow ◽  
Flow Loop ◽  
Waste Transfer ◽  
High Level ◽  
Slurry Transport

Abstract In the course of the U.S. Department of Energy’s (DOE) tank waste retrieval, immobilization, and disposal activities, high-level waste transfer lines have the potential to become plugged. In response to DOE’s needs, Florida International University’s Hemispheric Center for Environmental Technology (FIU-HCET) is studying the mechanism and behavior of pipeline plugging to determine the pipeline operating conditions for safe slurry transport. Transport behavior of multi-species slurry has been studied in a 1-in O.D. pipeline flow loop. The slurry was a five-species mixture of Fe2O3, Al2O3, MnO2, Ni2O3, and SiO2, which simulated actual waste at the Savannah River DOE site. The relationship between the pressure drop in the straight horizontal sections of the flow loop and the mean slurry flow velocity was determined for two solids volume concentrations of 5.2 and 7.8%. Critical deposition velocity was measured from visual observations. An existing empirical model that predicts the pressure gradient for a single-species slurry flow in a horizontal pipeline was used to describe the pressure drop data.

Better understanding of the filtration characteristics in the flexible fibre filter module (3FM)

2007 ◽  
Vol 55 (1-2) ◽  
pp. 77-83 ◽  
Author(s):  
J.J. Lee ◽  
J.H. Im ◽  
R. BenAim ◽  
J.R. Kim ◽  
Y.J. Kim ◽  
...  
Keyword(s):  
Particle Size ◽  
Pressure Drop ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Laboratory Scale ◽  
Filtration Velocity ◽  
Operating Parameters ◽  
Particle Retention ◽  
Packing Densities

This study is about the particle retention and filtration characteristics of fibre filter. Four laboratory scale fibre filters with different heights were used in parallel at various packing densities and filtration velocities. Of all of the operating parameters studied, filtration velocity had the most influence. Contrary to general theories, pressure drop increases slightly during the filtration in spite of the continuous retention of particles. This may have occurred because of large porosity of the packing (about 93%). This might be considered an advantage of the filter and something that makes it economic. The higher the filtration velocity, the larger the mass of particles retained in the filter. For filtration velocities of 20 and 40 m/h, particles smaller than 5 μm are retained as proven by the particle size distribution at the inlet and outlet.

Effect of coal particle size distribution on packed bed pressure drop and gas flow distribution

Fuel ◽  
2006 ◽  
Vol 85 (10-11) ◽  
pp. 1439-1445 ◽  
Author(s):  
M KEYSER ◽  
M CONRADIE ◽  
M COERTZEN ◽  
J VANDYK
Keyword(s):  
Particle Size ◽  
Pressure Drop ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Coal Particle ◽  
Gas Flow ◽  
Flow Distribution ◽  
Packed Bed

scholarly journals Coarse-Grained Geological Porous Media Structure Modeling Using Heuristic Algorithm and Evaluation of Porosity, Hydraulic Conductivity, and Pressure Drop with Experimental Results

2021 ◽  
Author(s):  
Javad Bezaatpour ◽  
Esmaeil Fatehifar ◽  
Ali Rasoulzadeh
Keyword(s):  
Particle Size ◽  
Porous Media ◽  
Hydraulic Conductivity ◽  
Pressure Drop ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Heuristic Algorithm ◽  
Flow In Porous Media ◽  
Coarse Grained ◽  
Water Retention Curve

Abstract Knowledge of porous media structure is an essential part of the hydrodynamic investigation of fluid flow in porous media. To study soil behavior (as a granular porous media) and water and contaminant movement in the vadose zone, appropriate estimation of soil water retention curve (SWRC) and soil hydraulic conductivity curve (SHCC) has a pivotal role and is one of the most challenging topics for researchers and engineers in soil and water science. The SWCR can be approximated using an accurate particle size distribution (PSD) function. In this study by applying random close packing (RCP) method as an encouraging method for predicting and studying particle configuration, an optimal particle size distribution is developed for coarse-grained soils (0.025 mm < PSD < 3.35mm). The mentioned RCP is generated using heuristic algorithm with merging applicable equations of soil science. For porous media modeling, MATLAB software is used and the predicted results by the optimal model for the parameters of porosity, pressure drop, and saturated hydraulic conductivity are compared with laboratory measurements. Experimental design is conducted by MINITAB and predicted coarse-grained soils structure by the model is compared with 4 sifted soils. The results of the sensitivity analysis showed that the porosity obtained from the model is strongly sensitive to the resolution factor and should be chosen with a sufficiently large amount (higher than 250). Results showed good consistency (up to 95%) between predicted porosity and only 10% difference in pressure drop and permeability with observed measurements.

Sign in / Sign up

Export Citation Format

Share Document