Nigel Heywood - Profile on Academia.edu (original) (raw)
Papers by Nigel Heywood
This paper provides a summary of slurry tank design for feeding and receiving slurry transported ... more This paper provides a summary of slurry tank design for feeding and receiving slurry transported through pipelines. It considers the solids suspension mechanisms, the relevant physical properties of the solid and liquid phases, and the type, number and position of appropriate agitators. Slurry tank operation covers the degree of solid suspension required such as "just-suspension" and cloud height, including the prediction of "just-suspension" agitator speed. The effect of the partial discharge and complete draining of a slurry tank, and therefore a progressive decrease in the slurry level in the tank, on the extent of particle suspension is also covered.
Effect of Particle Porosity on Pump Head Requirements for Phosphate Ore Slurry Distribution Pipelines at the Jorf Laskar Terminal Facilities in Morocco
Flow Curve Measurements for Process Engineering Design Applications
Troubleshooting a 556m Long Sand Slurry Pipeline
Preliminary Design of 200mm and 300mm NB Distribution Pipelines for Phosphate Slurry at the Jorf Lasfar Terminal Facilities in Morocco
The frictional pressure gradient for the horizontal, laminar pipe flow of non-Newtonian slurries ... more The frictional pressure gradient for the horizontal, laminar pipe flow of non-Newtonian slurries can be very large. Injecting gas into the pipe immediately downstream from a p ump can reduce the friction by 80% or more and occurs for the stratified, elongated bubble and slug flow patterns only. No reduction in pressure loss occurs when the flow is in the turbulent regime for either Newtonian or non-Newtonian fluids, nor is there any for a Newtonian fluid flowing in the laminar regime. As well as a reduction in frictional pressure loss, there is sometimes also an overall power saving (i.e., power to compress the gas is less than the reduction in pump power arising from gas injection), depending on the relative compressor and pump efficiencies. There is an optimal gas flowrate which achieves the greatest reduction in frictional pressure loss and this depends on several factors including the slurry flow curve, slurry flowrate, internal pipe diameter and therefore pipe Reynolds number f...
Head Loss Reduction by Gas Injection for Highly Shear-Thinning Suspensions in Horizontal Pipe Flow
ABSTRACT
A Survey of Non-Invasive Flowmeters for Pipeline Flow of High Concentration Slurries
ABSTRACT
The Performance of Commercially-available Coriolis Force Mass Flowmeters applied to Industrial Slurries
Assessment of Flow Properties of Pulverised Fuel Ash Slurries at High Concentrations
Evaluation of Seven Commercially-Available Electromagnetic Flowmeters with Newtonian and non-Newtonian China Clay Slurry in Pipeflow
Performance Evaluation of Eight Electromagnetic Flowmeters with Fine Sand Slurries
ABSTRACT
Alderman, N.J. and Heywood, N.I., Make Accurate Slurry Flow Curve Measurements, Chem. Eng. Prog, 100(5), 35-41, May 2004
Chemical Engineering Progress
Survey and Selection of Techniques for Bulk Solids Level Measurement in Storage Vessels
Survey and Selection of Techniques for Slurry Level and Interface Measurement in Storage Vessels
Recommissioning a two-km long waste mica slurry pipeline
Benefits and Modelling of Air Injection into Pipelines carrying Pastes including Thickened Tailings
Effect of comminuted flint on pumping chalk slurry in the 92-km Kensworth-Rugby pipeline
Design of a 2.5km long mica tailings slurry pipeline
The design, selection and application of valves for slurry pipeline service
ABSTRACT
This paper provides a summary of slurry tank design for feeding and receiving slurry transported ... more This paper provides a summary of slurry tank design for feeding and receiving slurry transported through pipelines. It considers the solids suspension mechanisms, the relevant physical properties of the solid and liquid phases, and the type, number and position of appropriate agitators. Slurry tank operation covers the degree of solid suspension required such as "just-suspension" and cloud height, including the prediction of "just-suspension" agitator speed. The effect of the partial discharge and complete draining of a slurry tank, and therefore a progressive decrease in the slurry level in the tank, on the extent of particle suspension is also covered.
Effect of Particle Porosity on Pump Head Requirements for Phosphate Ore Slurry Distribution Pipelines at the Jorf Laskar Terminal Facilities in Morocco
Flow Curve Measurements for Process Engineering Design Applications
Troubleshooting a 556m Long Sand Slurry Pipeline
Preliminary Design of 200mm and 300mm NB Distribution Pipelines for Phosphate Slurry at the Jorf Lasfar Terminal Facilities in Morocco
The frictional pressure gradient for the horizontal, laminar pipe flow of non-Newtonian slurries ... more The frictional pressure gradient for the horizontal, laminar pipe flow of non-Newtonian slurries can be very large. Injecting gas into the pipe immediately downstream from a p ump can reduce the friction by 80% or more and occurs for the stratified, elongated bubble and slug flow patterns only. No reduction in pressure loss occurs when the flow is in the turbulent regime for either Newtonian or non-Newtonian fluids, nor is there any for a Newtonian fluid flowing in the laminar regime. As well as a reduction in frictional pressure loss, there is sometimes also an overall power saving (i.e., power to compress the gas is less than the reduction in pump power arising from gas injection), depending on the relative compressor and pump efficiencies. There is an optimal gas flowrate which achieves the greatest reduction in frictional pressure loss and this depends on several factors including the slurry flow curve, slurry flowrate, internal pipe diameter and therefore pipe Reynolds number f...
Head Loss Reduction by Gas Injection for Highly Shear-Thinning Suspensions in Horizontal Pipe Flow
ABSTRACT
A Survey of Non-Invasive Flowmeters for Pipeline Flow of High Concentration Slurries
ABSTRACT
The Performance of Commercially-available Coriolis Force Mass Flowmeters applied to Industrial Slurries
Assessment of Flow Properties of Pulverised Fuel Ash Slurries at High Concentrations
Evaluation of Seven Commercially-Available Electromagnetic Flowmeters with Newtonian and non-Newtonian China Clay Slurry in Pipeflow
Performance Evaluation of Eight Electromagnetic Flowmeters with Fine Sand Slurries
ABSTRACT
Alderman, N.J. and Heywood, N.I., Make Accurate Slurry Flow Curve Measurements, Chem. Eng. Prog, 100(5), 35-41, May 2004
Chemical Engineering Progress
Survey and Selection of Techniques for Bulk Solids Level Measurement in Storage Vessels
Survey and Selection of Techniques for Slurry Level and Interface Measurement in Storage Vessels
Recommissioning a two-km long waste mica slurry pipeline
Benefits and Modelling of Air Injection into Pipelines carrying Pastes including Thickened Tailings
Effect of comminuted flint on pumping chalk slurry in the 92-km Kensworth-Rugby pipeline
Design of a 2.5km long mica tailings slurry pipeline
The design, selection and application of valves for slurry pipeline service
ABSTRACT