Technical Report on NETL's Non Newtonian Multiphase Slurry Workshop:  A path forward to understanding non-Newtonian multiphase slurry flows

Guenther, Chris; Garg, Rahul

doi:10.2172/1121879

Cited by 2 publications

(4 citation statements)

References 59 publications

(82 reference statements)

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“…The carrier possesses yield stress and viscosity that are a combined function of mineralogy, surface chemistry, particle size distribution, and shear history. The yield stress is also a strong function of solids concentration. , According to Chhabra and Richardson, the transport of coarse particles in a laminar, non-Newtonian carrier fluid flow has two advantages: (i) the maximum apparent viscosity of a shear-thinning fluid occurs at the pipe center, which promotes particle suspensions so that less solids accumulate in the pipeline, and, (ii) the minimum apparent viscosity occurs at the pipe wall, which maintains relatively low frictional pressure loss associated with less energy consumption. Particle suspensions are further facilitated by the presence of a yield stress.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Compared to the numerous studies on Newtonian slurry flows, the transport of coarse particles in a non-Newtonian carrier fluid has not been studied extensively, which is probably due to the complex interactions between particles and non-Newtonian carrier fluid. 4 In addition to the hydrodynamic conditions, the rheological parameters, e.g., yield stress, are also of paramount importance to determining the flow behavior. For a broad particle size distribution, Pullum et al 29 divided the particle sizes into three categories according to the resulting flow patterns, i.e., carrier equivalent fluid, heterogeneous and fully stratified, which correspond to particle sizes d p < 200 μm, 200 μm ≤ d p < 0.015D, and d p > 0.015D, where D is the pipe diameter, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

CFD Simulation of Turbulent non-Newtonian Slurry Flows in Horizontal Pipelines

Sadeghi

Zheng

et al. 2022

Ind. Eng. Chem. Res.

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Understanding the flow behavior of complex concentrated slurries is of tremendous importance for industrial waste management. In this study, the transport of three-phase oil sands tailings in a horizontal pipeline is simulated via the mixture multiphase model coupled with the kinetic theory of granular flow. The solid particles and bitumen droplets are conveyed via a non-Newtonian carrier fluid in a turbulent regime inside an industrial-scale pipeline. The simulation results showed exceptional agreement with the field data, with errors of < 3.5% for velocity distribution and < 15% for the pressure drop.A systematic parametric investigation was performed for a wide range of flow conditions, showing that the majority of bitumen droplets reside at the top region of the pipe.Our findings may help design an effective process for the separation of bitumen residues during pipeline transport.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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CFD Simulation of Turbulent non-Newtonian Slurry Flows in Horizontal Pipelines

Sadeghi

Zheng

et al. 2022

Ind. Eng. Chem. Res.

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“…This process is repeated over a number of cycles until the desired level of homogeneity is achieved [1].…”

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confidence: 99%

CFD Evaluation of Mixing Processes for High-Level Nuclear Waste Tanks

Edrei¹

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Computational Fluid Dynamics (CFD) has been applied to investigate two aspects of a mixing process for high level nuclear waste tanks. Through CFD the applicability of Poreh's correlations that are currently used to describe the radial wall jets in the Pulse Jet Mixing (PJM) process were assessed. In addition, simulations were conducted in order to investigate mean hydrodynamic characteristics of sparged non-Newtonian fluids for the use in the PJM process.Three single phase turbulent simulations using the commercial package STAR-CCM+ were successively conducted. A model validated with experimental data was developed and successively altered to see the effects of low characteristic ratio and a curved impingement surface. Results suggested that Poreh's correlations are applicable under PJM conditions and geometry.Lastly, multi-phase Eulerian-Eulerian Simulations were conducted using the commercial software package ANSYS Fluent. Altering the characteristic ratio (h/D) of a sparged non-Newtonian fluid system resulted in a trend of flattening air volume fraction and air axial velocity profiles with decreasing characteristic ratio.

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Technical Report on NETL's Non Newtonian Multiphase Slurry Workshop: A path forward to understanding non-Newtonian multiphase slurry flows

Cited by 2 publications

References 59 publications

CFD Simulation of Turbulent non-Newtonian Slurry Flows in Horizontal Pipelines

CFD Simulation of Turbulent non-Newtonian Slurry Flows in Horizontal Pipelines

CFD Evaluation of Mixing Processes for High-Level Nuclear Waste Tanks

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