Pipeline flow of coarse particle slurries

The horizontal pipeline flow of coarse-particle slurries has been examined. The study includes an evaluation of previous work, an experimental investigation and a presentation of improved modelling techniques for determining pipeline design parameters. The experimental investigation was carried out to obtain an improved database for modelling the flow of coarse-particle slurries. Tests were conducted using sand slurries and coal slurries in pipes of industrial scale. Frictional headlosses, delivered solids concentrations, concentration distributions and velocity distributions were measured as functions of in situ solids concentration and mean velocity. Solids deposition velocities were determined visually using transparent pipe sections. The experimental results were used to develop an improved two layer model for estimating frictional headlosses, a force balance model for concentration distributions and a method for predicting deposition velocities. The fraction of contact load, which contributes sliding friction at the pipe wall, was found to be primarily dependent on the ratio of the mean flow velocity to the settling velocity of the mass median coarse (+0.074 mm) particle size. The models contain empirical correlations which incorporate a wide range of experimental conditions but are restricted to mixtures containing less than 35% coarse particles by volume. The correlations were tested using carrier fluids which were essentially Newtonian with viscosities less than 4 mPa.s.

Name thesis:degree_name

Doctor of Philosophy (Ph.D.)

Level thesis:degree_level

Doctoral

Discipline thesis:degree_discipline

Chemical Engineering

Grantor

University of Saskatchewan

Year dc:date.issued

1993

Author dc:creator

• Gillies, Randall Gordon

Advisor dc:contributor.advisor

• Shook, Clifton A.

Language dc:language.iso

en_US

Handle dc:identifier.uri

https://hdl.handle.net/10388/etd-03242009-142017

OAI identifier oai:identifier

oai:harvest.usask.ca:10388/etd-03242009-142017