The transport of particles at low loading in near-horizontal pipes by intermittent flow

Stevenson, Paul; Thorpe, Rex B.; Kennedy, Jan; McDermott, Christopher

doi:10.1016/s0009-2509(00)00491-7

Cited by 49 publications

(53 citation statements)

References 12 publications

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“…This lower rate of transport of solids is apparent when the particle transport experiments in slug flow of Stevenson et al (2001b) are compared to the analogous experiments on particles in hydraulic conveying performed by Kennedy and McDermott (2000).…”

Section: Implications Of Heterogeneity Of Power Dissipation On Particmentioning

confidence: 82%

“…The gas fraction in the slug nose is also assumed to be constant and equal to that in the main slug although experimental evidence shows that the slug nose is rather more aerated than the developed slug body (Stevenson et al, 2001b). On eliminating P 1 , P 2 and DP fric between Equations (2) and (3) we have: …”

Section: Pressure Gradient Within the Slug Nosementioning

confidence: 99%

“…In addition, because of the re-circulating flow pattern of the slug nose, it is seen that wall shear stress at the bottom of the pipe is lower than the value expected for liquid only flow for at least approximately 18D (18D is the slug length used in the simulations of Manfield, 2000) more difficult to move particles in the region of the slug nose than in hydraulic conveying. Indeed, high speed video footage of particle behaviour at the slug nose (Stevenson et al, 2001b) shows that grains of sand remain at rest until they are 3D to 5D upstream of the nose when, apparently, the shear stress at the pipe wall becomes sufficient to cause movement.…”

Section: Numerical Simulation Of Slug Nose Fluid Dynamicsmentioning

confidence: 99%

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Energy Dissipation at the Slug Nose and the Modeling of Solids Transport in Intermittent Flow

Stevenson

Thorpe

2003

Can J Chem Eng

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It is shown, by means of Lagrangian momentum and power balances across the slug nose in slug flow, that the power dissipated due to sudden expansion of the fluid in the film immediately downstream of the slug nose is greater than the power lost due to viscous action at the pipe wall but that it may not be large enough to materially aid particle transport. This has the implication that sand transport in intermittent flow may be considered as transport in a hybrid flow of hydraulic conveying and stratified flow when the length of the mixing section at the slug nose is short compared to the length of the slug body.

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Section: Implications Of Heterogeneity Of Power Dissipation On Particmentioning

confidence: 82%

Section: Pressure Gradient Within the Slug Nosementioning

confidence: 99%

Section: Numerical Simulation Of Slug Nose Fluid Dynamicsmentioning

confidence: 99%

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Energy Dissipation at the Slug Nose and the Modeling of Solids Transport in Intermittent Flow

Stevenson

Thorpe

2003

Can J Chem Eng

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“…The two sand concentrations investigated for the same particle size both in horizontal and inclined test sections clearly showed the significant effects of sand loading with respect to flow rates on sand transportation patterns in water-gas flow. The 50 d used in this experiment, 250-300 microns is a representative of the particle size commonly found in oil and gas production pipelines [12].…”

Section: Resultsmentioning

confidence: 99%

“…This indicated that the change in pipe inclinations affects the flow patterns and consequently the MTV required for sand particle transport. Stevenson [12]argued that the impact of slug flow on solid particle transport is better appreciated on arrival of the turbulent core of the slug. It was obvious from the experiment that the slug flow played significant role in the transportation of solid particles in pipes caused by the change in pipe angles.…”

Section: Effect Of Pipe Angle/inclination On Mtvmentioning

confidence: 99%

Experimental Investigation of Sand Minimum Transport Velocity in Multiphase Fluid Flow in Pipes

Bello¹,

Oyeneyin²

2016

Nig. J. Tech.

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Solids transport models comparison and fine‐tuning for horizontal, low concentration flow in single‐phase carrier fluid

et al. 2013

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We determined and fine‐tuned the solids transport models appropriate for predicting the single‐phase carrier fluid velocity to transport solid particles in conduits for horizontal, low concentration flow. A database with 538 experimental data points was compiled. A literature review was performed to determine the data ranges, forces, and mechanisms used to develop 44 models, and their velocity predictions were compared against the database using statistics. Using the dimensionless forms of the models and the data, the model parameters were adjusted to improve their accuracy and identify the dominant forces. At low concentrations: for liquid/solid flow from a bed of solids and gas/solid flow from the bottom of pipelines, the particle weight, and inertial and viscous forces dominate; for gas/solid flow from a bed of solids, the particle weight, and inertial, viscous, and adhesive forces play a role; and gaps exist in the data for large‐diameter pipes and high‐density gases. © 2013 American Institute of Chemical Engineers AIChE J, 60: 76–122, 2014

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The transport of particles at low loading in near-horizontal pipes by intermittent flow

Cited by 49 publications

References 12 publications

Energy Dissipation at the Slug Nose and the Modeling of Solids Transport in Intermittent Flow

Energy Dissipation at the Slug Nose and the Modeling of Solids Transport in Intermittent Flow

Experimental Investigation of Sand Minimum Transport Velocity in Multiphase Fluid Flow in Pipes

Solids transport models comparison and fine‐tuning for horizontal, low concentration flow in single‐phase carrier fluid

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