Improvements in the numerical prediction of fully-suspended slurry flow in horizontal pipes

Messa, Gianandrea Vittorio; Malavasi, Stefano

doi:10.1016/j.powtec.2014.10.027

Cited by 55 publications

(36 citation statements)

References 41 publications

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“…The eddy viscosity, ν t , was evaluated by an extension of the standard high-Reynolds form of the k-ε model of Launder and Spalding (1974) to two-phase flows, which is well documented in Messa et al (2013Messa et al ( , 2014Messa et al ( , 2015.…”

Section: Methodology Governing Equationsmentioning

confidence: 99%

A combined CFD-experimental method for abrasive erosion testing of concrete

Messa

Branco

Filho

et al. 2017

Journal of Hydrology and Hydromechanics

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Serious damage may occur to concrete hydraulic structures, such as water galleries, spillways, and stilling basins, due to the abrasive erosion caused by the presence of solid particles in the flow. This underlines the importance of being capable in providing characterization of the concrete from the point of view of its vulnerability to abrasive erosion, in order to improve the design of the structure and the material selection. Nevertheless, the existing apparatus for concrete abrasive erosion testing are either far from allowing realistic simulation of the actual environment in which this phenomenon occurs, or show a large degree of complexity and cost. An alternative method has been developed with the aid of Computational Fluid Dynamics (CFD). CFD was first employed to verify the effectiveness of a new laboratory equipment. Afterwards, a parameter has been introduced which, by successful comparison against preliminary experiments, proved suitable to quantify the effect of the fluid dynamic conditions on the concrete abrasive erosion, thereby opening the way to CFD-based customization of the apparatus. In the future, the synergy of numerical and physical modelling will allow developing predictive models for concrete erosion, making it possible to reliably simulate real structures.

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Section: Methodology Governing Equationsmentioning

confidence: 99%

A combined CFD-experimental method for abrasive erosion testing of concrete

Messa

Branco

Filho

et al. 2017

Journal of Hydrology and Hydromechanics

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“…The liquid-solid flow, also known as slurry flow, is commonplace in industrial applications. In the past years, considerable efforts have been devoted to several important indicators of slurry flow in horizontal pipe, such as pressure gradient [1][2][3][4][5], concentration and velocity distribution [6][7][8][9][10][11], and critical deposition velocity [12][13][14]. However, the existing studies have been limited to circular tubes with greater-than-50.7mm diameter.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic investigation of slurry flows in horizontal narrow rectangular channels

Ren¹,

Zhao²,

Zhang³

2017

IJHT

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Despite the extensive research on the liquid-solid two-phase flow in horizontal circular tubes, there is rarely any discussion over the liquid-solid two-phase hydrodynamics and the solid phase diffusion features in horizontal narrow rectangular channels. To make up for the gap, this paper employs the experimental method and CFD-DEM to investigate the hydrodynamics of glass beads-water slurry flows in a 12-mm tall horizontal rectangular channel, and explore the slurry flow features of the system at the velocity of 1.0m/s. The main conclusions are as follows. First, a dilute disperse phase and a dense cluster phase were formed; Second, in the vertical direction, the solid concentration is positively correlated with the degree of asymmetry of solid velocity profiles, but negatively with that of solid concentration profiles; Third, three distinct regions in the slurry flows exhibited different standard variances of solid velocity and solid concentration. This research provides new insights into the liquid-solid two-phase flow in horizontal narrow rectangular channels.

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“…Messa and Malavasi [20] proposed a new two-fluid model for the simulation of fully suspended liquid-solid slurry flows in horizontal pipes. The model is claimed to address wall boundary conditions for solid phase, viscosity of the slurry mixture which incorporates particle shape, and a solution algorithm which reduces computational burden.…”

Section: Introductionmentioning

confidence: 99%

Eulerian-Eulerian Simulation of Particle-Liquid Slurry Flow in Horizontal Pipe

Ofei

Ismail

2016

Journal of Petroleum Engineering

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In this study, a computational fluid dynamics (CFD) simulation which adopts the inhomogeneous Eulerian-Eulerian two-fluid model in ANSYS CFX-15 was used to examine the influence of particle size (90 μm to 270 μm) and in situ particle volume fraction (10% to 40%) on the radial distribution of particle concentration and velocity and frictional pressure loss. The robustness of various turbulence models such as the k-epsilon (k-ε), k-omega (k-ω), SSG Reynolds stress, shear stress transport, and eddy viscosity transport was tested in predicting experimental data of particle concentration profiles. The k-epsilon model closely matched the experimental data better than the other turbulence models. Results showed a decrease in frictional pressure loss as particle size increased at constant particle volume fraction. Furthermore, for a constant particle volume fraction, the radial distribution of particle concentration increased with increasing particle size, where high concentration of particles occurred at the bottom of the pipe. Particles of size 90 μm were nearly buoyant especially for high particle volume fraction of 40%. The CFD study shows that knowledge of the variation of these parameters with pipe position is very crucial if the understanding of pipeline wear, particle attrition, or agglomeration is to be advanced.

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Improvements in the numerical prediction of fully-suspended slurry flow in horizontal pipes

Cited by 55 publications

References 41 publications

A combined CFD-experimental method for abrasive erosion testing of concrete

A combined CFD-experimental method for abrasive erosion testing of concrete

Hydrodynamic investigation of slurry flows in horizontal narrow rectangular channels

Eulerian-Eulerian Simulation of Particle-Liquid Slurry Flow in Horizontal Pipe

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