Laminar flow of Non‐Newtonian thickened tailings slurry through an open channel

Javadi, Sadegh; Gupta, Rahul; Bhattacharya, S. N.; Slatter, Paul

doi:10.1002/cjce.22292

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…To the authors' best knowledge, a comprehensive model for open channel flow of non-Newtonian fluid with solids particles is not currently available. However, there are published models for thickened tailings open channel flow such as Javadi et al (2016) that can be utilised for this purpose. Some of the commercially available software packages such as FLO-2D also have an embedded approximation for the turbulent head loss term in the constitutive model used in the software (FLO-2D 2022).…”

Section: Tailings Dam Break Modelling Proceduresmentioning

confidence: 99%

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Estimating rheological properties of liquefied tailings for dam break simulation using site-specific parameters and laboratory testing

Pirouz¹,

Lu²,

Rudd³

2023

Paste 2023: 25th International Conference on Paste, Thickened and Filtered Tailings

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Tailings dam failures, claiming human lives and causing catastrophic environmental impact, are unfortunately still frequently reported around the world.The tailings dam break simulation using site-specific parameters has now become an essential and critical part of the design, operation and closure cycle of every tailings storage facility (TSF), and is a requirement in many guidelines such as ANCOLD (2012), CDA (2021) and ICMM (2020). Urging from the mining industry and regulatory authorities for the development of better and more comprehensive simulating techniques that can accurately predict the flow behaviour of liquefied tailings in the hypothetical scenario of a tailings dam breach has significantly increased in recent years.The tailings deposited in a TSF often form a density profile with depth as the tailings consolidate and gain strength. This process increases the solids concentration and shear strength of the tailings within the TSF to a range that often makes direct measurement of the rheological properties of samples from the site using conventional bob and cup rotary viscometry impractical. Consequently, this imposes a challenge for obtaining reliable results from the tailings dam break simulation and needs to be overcome.A methodology is proposed in this paper for estimating the rheological properties of liquefied tailings at high solids concentrations when the direct measurement technique is impractical. The method is based on combining site-specific parameters such as the in situ dry density with laboratory-measured parameters such as the residual shear strength of the tailings after failure, and the bob and cup rotary viscometry data at lower solids concentrations.The method can be applied to establish a comprehensive understanding of the rheological behaviour of liquefied tailings at the wide range of solids concentrations required for dynamic tailings dam break modelling.

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Section: Tailings Dam Break Modelling Proceduresmentioning

confidence: 99%

“…Most of the flow and head loss models developed for non-Newtonian fluid are developed and calibrated based on either the Herschel-Bulkley model (Javadi et al 2016) or Bingham plastic models (FLO-2D 2022).…”

Section: Rheological Testing To Estimate Properties Of Liquefied Tail...mentioning

confidence: 99%

Estimating rheological properties of liquefied tailings for dam break simulation using site-specific parameters and laboratory testing

Pirouz¹,

Lu²,

Rudd³

2023

Paste 2023: 25th International Conference on Paste, Thickened and Filtered Tailings

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“…Interestingly, most of the reported research is mainly concerned with the slurry transport for the lab-scale data for Newtonian liquids [34][35][36][37][38]42], while several industrial slurry systems likely exhibit complex non-Newtonian behaviors [43][44][45]. On the other hand, secondary phases like droplets and bubbles play a significant role in industrial scales pipeline transport such as oil sand tailings and mining residuals [46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics investigation of bitumen residues in oil sands tailings transport in an industrial horizontal pipe

Sontti¹,

Sadeghi²,

Zhou³

et al. 2022

Preprint

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Bitumen residues in the oil sand tailings can be a threat to the environment that separating them from tailings before disposal is crucial. This study establishes an Eulerian-Eulerian computational fluid dynamics (CFD) model for an industrial-scale oil sand tailings pipeline. A comprehensive sensitivity analysis was conducted on the selection of carrier-solid and solid-bitumen drag models. The combination of small and large particle sizes (i.e., 75 & 700 µm) and bitumen droplet size (i.e., 400 µm) provided good agreement with field data in velocity profiles and pressure drop. The validated model was subsequently extended to investigate the influence of the secondary phase (i.e., bitumen droplets and bubbles) on flow characteristics in a tailing pipeline. The investigation covered a range of bitumen droplet size (100-400 µm), bitumen fraction (0.0025-0.1), bubble size (5-1000 µm), and bubble fraction (0.0025-0.3) and their influences on the velocity, solids, and bitumen distribution are revealed. For an optimum bubble size of 500 µm, a maximum recovery of 59% from the top 50 % and 83 % from the top 75 % of the pipe cross-section was obtained. The present study demonstrates the preferential distribution of bitumen and provides valuable insight on bitumen recovery from an industrial-scale tailings pipeline.

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Analytical solutions for the flow depth of steady laminar, Bingham plastic tailings down wide channels

Ihle

Tamburrino

2018

Minerals Engineering

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Laminar flow of Non‐Newtonian thickened tailings slurry through an open channel

Cited by 5 publications

References 22 publications

Estimating rheological properties of liquefied tailings for dam break simulation using site-specific parameters and laboratory testing

Estimating rheological properties of liquefied tailings for dam break simulation using site-specific parameters and laboratory testing

Computational fluid dynamics investigation of bitumen residues in oil sands tailings transport in an industrial horizontal pipe

Analytical solutions for the flow depth of steady laminar, Bingham plastic tailings down wide channels

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