Numerical simulation of flow behavior of particles in a porous media based on CFD-DEM

Wang, Shuyan; Li, Haoting; Wang, Ruichen; Tian, Ruichao; Sun, Qiji; Yi, Ma

doi:10.1016/j.petrol.2018.07.039

Cited by 13 publications

(5 citation statements)

References 26 publications

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“…Thus, the force should especially not be neglected. The Saffman lift force (f Saff,i ) is calculated by Equation (5).…”

Section: Governing Equation For the Fluid Phasementioning

confidence: 99%

“…[2][3][4] Typical parameters governing the performance of mixing include the mixer structural parameters, particle speed pattern, and particle size distribution parameters. [5] For mixing discrete particles in a fluidized bed, two types of mechanical mixer and airflow-assisted mixer are frequently used. [6] Compared with mechanical mixers, airflowassisted mixers are suitable for larger mixing tanks with satisfactory mixing uniformity, low energy consumption, acceptable sealing performance, and great environmental benefits.…”

Section: Introductionmentioning

confidence: 99%

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Numerical study of the mixing characteristics in an air swirling fluidized bed with monodisperse and multi‐sized particles

et al. 2023

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Powder mixers are used in many industries. In the present work, a new type of air swirling mixer was designed and optimized with eight horizontally arranged inlet pipes at the tangential inlet angle of 35°. The mixing of multi‐sized spherical particles (2.0, 3.0, 4.0, and 5.0 mm) was numerically investigated in the air swirling mixer by coupled computational fluid dynamics–discrete element method. The numerical results showed that multi‐sized particles achieved comparable mixing performance to monodisperse particles. The Lacey index for multi‐sized particles increased initially, and then reached a maximum value at 0.824. The upward velocity of the particles, , increased initially, and then decreased to zero along the bed height. The maximum value of occurred at a height of 40 mm. Particle radial velocity was larger near the wall than at the mixer tube centre area. The smallest particles aggregated in three layers. The collision number of the particles reached a maximum at bed height of 120 mm, which was consistent with the position of the maximum stress of the particles against the tube wall.

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“…Thus, the force should especially not be neglected. The Saffman lift force (f Saff,i ) is calculated by Equation (5).…”

Section: Governing Equation For the Fluid Phasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical study of the mixing characteristics in an air swirling fluidized bed with monodisperse and multi‐sized particles

et al. 2023

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“…Furthermore, it is proposed that the particle property parameters determine the morphology and stability of the force chain, and the complex dynamic response of the force chain network determines the macroscopic mechanical properties of the system, thus constructing a cross-scale correlation of the macro–meso–micro-mechanical behavior of the particulate matter system. At present, computational fluid dynamics–discrete element method (CFD–DEM) coupling − has been used to study the rheological properties of suspension, , the aggregation behavior of particles in the flow field, , and the obstruction effect on the flow field, , and the stability of the structure of the particle system has been judged by the force chain evolution process, − which proves the importance of the force chain network structure in the gel system and the particle system.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior Analysis of Wax Crystals during Crude Oil Gelation

Dong

Zhao

et al. 2023

ACS Omega

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The motion behaviors, rheological properties, and mechanical properties of a wax crystal mesoscale force chain network of waxy crude oil during gelation were experimentally studied and simulated by rheo-optic in situ measurement and computational fluid dynamics–discrete element method (CFD–DEM) numerical simulation, respectively. The motion behavior characteristics of wax crystals and the changes in the average coordination number of wax crystal networks were obtained at different temperatures. The study investigates the rule of crude oil rheological deterioration, the increase of wax crystals, and the changes in wax crystal motion behaviors with decreasing temperature. The relationship between the structure of the mesoscale force chain of the wax crystal network and the motion behaviors of the wax crystal and its rheological properties was analyzed. The results show that the average motion velocity of wax crystals or aggregates decreases from 28.48 to 22.56 μm/s when the temperature decreases from wax appearance temperature (48 °C) to 25 °C. The rotation and rolling trend of wax crystals gradually flatten, and the average coordination number increases 4.39 times. The viscosity of waxy crude oil increases from 6.27 to 8369.7 mPa·s, and the average coordination number of wax crystals obtained by CFD–DEM also increases significantly, which confirms the experimental results. We also found that when the system tended to gelation, a complex and stable force chain network was formed between the wax crystals, with a force chain coverage of 87.93% and a significant increase in the pressure drop in the flow field, which is consistent with the variation pattern of the system viscosity. The micro–meso-dynamic behavior analysis of waxy crude oil combined with CFD–DEM coupling provides a new way to explore the rheological properties of waxy crude oil and the microscopic mechanism of its modification.

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“…The particle size‐exclusion mechanism in a smooth fracture with a constrict has been extensively studied, and the general conclusion of these studies is that mechanical bridging is more prone to occur when the particle size is larger than one‐third of the fracture width . The phenomena of particle penetration and mud cake formation in packed beds have been studied widely . However, the packed bed cannot mimic the real porous media.…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16]19 The phenomena of particle penetration and mud cake formation in packed beds have been studied widely. [20][21][22] However, the packed bed cannot mimic the real porous media. The coupled LBM-DEM-IMB method was used to study the particle migration and plugging in real pores.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of particulate suspension transport and permeability impairment in an actual rough fracture under normal stresses

Bin

Tang

Zhao

et al. 2019

Energy Science & Engineering

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The transportation and capture of particulate suspension in a rough fracture are widely encountered in hydrocarbon exploitation. According to a full review of the literature, traditional studies mainly focus on the placement and settlement of coarse particles such as proppants and lost circulation materials. Furthermore, a fracture is often considered to be equivalent to smooth parallel plates, whereas actual fractures are roughly walled with microconvex and are affected by normal stresses. The particulate suspension transport mechanism in a fracture under different normal stresses is still unclear. This paper proposes an approach to evaluate the permeability impairment caused by size‐exclusion of solid particles in a fracture under different normal stresses. The morphology of fracture flow space under different normal stresses is obtained by using optical scanning and FEM. Furthermore, the unresolved CFD‐DEM method is used to study the mechanism of the capture and migration of the particulate suspension in a fracture. The simulation results are in agreement with the experimental results. Furthermore, the effects of the particle size, particle concentration, injected particle volume, fracture occurrence, and applied pressure on particle invasion are discussed.

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Numerical simulation of flow behavior of particles in a porous media based on CFD-DEM

Cited by 13 publications

References 26 publications

Numerical study of the mixing characteristics in an air swirling fluidized bed with monodisperse and multi‐sized particles

Numerical study of the mixing characteristics in an air swirling fluidized bed with monodisperse and multi‐sized particles

Dynamic Behavior Analysis of Wax Crystals during Crude Oil Gelation

Numerical simulation of particulate suspension transport and permeability impairment in an actual rough fracture under normal stresses

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