Modeling of particle velocities in an apparatus with a draft tube operating in a fast circulating dilute spout-fluid bed regime

Ludwig, W.; Zając, D.

doi:10.1016/j.powtec.2017.07.001

Cited by 16 publications

(7 citation statements)

References 40 publications

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“…The influence of particle-particle restitution on particle fluid was researched by TFM method. [18][19][20] Ludwig et al 21 verified the applicability of the TFM for the description of hydrodynamics of particle flow parameters such as restitution coefficient. Yang et al 22 investigated the effect of normal restitution coefficient and friction coefficient on the hydrodynamics of a dense solid-gas-fluidized bed using TFM based on KTGF model.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Sand Filling Process and Analysis of Flow Behavior with Different Binder Ratio

et al. 2019

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Core shooting process has a great influence on the quality of sand cores. At present, there are two computational fluid dynamic models applied to simulate the hydrodynamics of core shooting process. In this paper, a two-fluid model (TFM) simulation is made on fluid dynamic analysis. With validation of experimental results and discrete particle model (DPM) simulations, the TFM is able to predict a reasonable flow behavior of sand particles by gas dynamic pressure analysis. Residual gas distribution of sand filling process is analyzed and a good agreement is achieved between air volume fraction simulation based on TFM and experimental results. A comparison between different binder ratios is made. The binder ratio has a significant effect on sand hydrodynamic behavior and the sand volume fraction.

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Section: Introductionmentioning

confidence: 99%

Simulation of Sand Filling Process and Analysis of Flow Behavior with Different Binder Ratio

et al. 2019

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“…In the chemical and metallurgical industries, the spouted beds have been used in many applications such as coating, drying, mixing, and coal gasification. , Many experimental testing and numerical simulations of spouted beds have been performed to determine the physics of gas–solid processes. − ,− Devahastin et al experimentally developed a rotating jet annular spouted bed dryer for drying of particles in the falling rate period. Parise et al studied the flow behavior of a slot-rectangular spouted bed of biomass particles with simultaneous injection of jet and pulsating airflow.…”

Section: Introductionmentioning

confidence: 99%

“…Estiati et al conducted a study on the influence of geometrical dimensions and structures of a restraint pipe and draft tube on entrainment, working pressure drop, working air flow rate, and maximum cycle time. The TFM approach has been widely used for simulating practical gas–solid flow behavior in spouted beds. − , Lan et al numerically analyzed the effect of specularity coefficient and particle–wall restitution coefficient on hydrodynamics of spouted beds using a two-fluid model method. Wang et al compared the experimental results and numerical simulations of hydrodynamics in a conical spouted bed.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation and Optimization of Mixing Behaviors in a Spouted Bed with a Longitudinal Vortex

Bai

Zhang

et al. 2019

ACS Omega

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The radial mixing characteristics of gas and solid phases in a cylindrical spouted bed with a pair of longitudinal vortex generators (LVGs) are numerically studied by a two-fluid model. The influence of the distance between the centers of two spheres ( L ) and the shape of LVGs on hydrodynamics in a spouted bed are discussed. The results show that the value of the coefficient of variation (CV) of the particle concentration can be significantly reduced by the longitudinal vortex produced in spouted beds. The particle concentration near the spout decreases first and then increases with the increase of L . When the shape of LVGs is cylindrical, a maximum increase of 188 % for particle volume fraction is found near the spout region of the spouted bed. The strengthening effect on particles’ velocity achieves the best in annulus of the spouted bed, and CV of the particle concentration in the spouted bed reaches its minimum value with a pair of cylindrical LVGs.

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“…The popularity of this approach compared to the DEM stems from relatively smaller CPU and memory resource requirements. As a result, the TFM approach is more commonly used for modeling practical spouting flows , , , . Lan et al numerically studied the influence of the solid‐phase wall boundary conditions in terms of specularity coefficient and particle‐wall restitution coefficient on the flow behavior of spouted beds using the TFM approach.…”

Section: Introductionmentioning

confidence: 99%

“…Sun et al numerically examined the flow behavior of ultrafine powders in a conical spouted bed with coarse particles using the TFM method. Ludwig et al verified the applicability of the Euler‐Euler model for the description of hydrodynamics of particle flow in an apparatus with a circulating dilute spout‐fluid bed, as well as to test the impact of model parameters, such as interphase momentum coefficient, restitution coefficient, and packing limit on the velocity results of the dispersed phase. Sun et al numerically investigated the flow behavior of gas and ultrafine powder in a spouted bed using a TFM coupled with a population balance equation and then analyzed the influence of cohesive intensity and gas velocity on the diameter distribution.…”

Section: Introductionmentioning

confidence: 99%

Influence of Longitudinal Vortex Generator Configuration on the Hydrodynamics in a Novel Spouted Bed

Huang

Zhang

et al. 2018

Chem Eng & Technol

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The gas-solid flow in a cylindrical spouted bed with a pair of spherical longitudinal vortex generators (LVGs) was numerically investigated by a two-fluid model with kinetic theory for granular flow. Simulations and analyses were conducted on five types of spouted beds: a conventional spouted bed without disturbance units as well as spouted beds with a pair of LVGs in which the radius of spheres installed on the LVGs had four different dimensions. Results of the computational fluid dynamics demonstrate that the fountain height decreases with larger radius, and the influence range of the longitudinal vortex increases with the greater radius, both for the gas phase and particle phase. The turbulent kinetic energy of the gas phase along the radial and axial directions in the spouted bed was also promoted significantly by the longitudinal vortex and increased with larger radius, which is due to the higher LVG volume.

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Modeling of particle velocities in an apparatus with a draft tube operating in a fast circulating dilute spout-fluid bed regime

Cited by 16 publications

References 40 publications

Simulation of Sand Filling Process and Analysis of Flow Behavior with Different Binder Ratio

Simulation of Sand Filling Process and Analysis of Flow Behavior with Different Binder Ratio

CFD Simulation and Optimization of Mixing Behaviors in a Spouted Bed with a Longitudinal Vortex

Influence of Longitudinal Vortex Generator Configuration on the Hydrodynamics in a Novel Spouted Bed

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