Effect of Packing Structure Evolution on the Flow Characteristics in a Binary Composite Packed Bed Based on DEM-CFD Method

Shen, Cunliang; Li, Mingchun; Ji, Jie; Yang, Xin; Li, Laishi; Wu, Yusheng

doi:10.3390/pr11030732

Cited by 3 publications

(1 citation statement)

References 48 publications

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“…It makes it possible to model the flow of fluids through packed beds and predict the performance of the porous media. The CFD-DEM coupling has also been recently used for evaluating the flow characteristics through the packed beds [6]. For instance, the CFD-DEM coupling has been widely used for studying and optimizing flow characteristics in fixed bed gasifiers [7], heat transfer in characteristics within packed beds of particles [8] and even including chemical reactions in particulate bed reactors [9].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Discrete Element Method Parameters on Realistic Representation of Spherical Particles in a Packed Bed

Ghasemi Monfared,

Hellström,

Umeki

2024

Processes

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Packed bed reactors play a crucial role in various industrial applications. This paper utilizes the Discrete Element Method (DEM), an efficient numerical technique for simulating the behavior of packed beds of particles as discrete phases. The focus is on generating densely packed particle beds. To ensure the model accuracy, specific DEM parameters were studied, including sub-step and rolling resistance. The analysis of the packed bed model extended to a detailed exploration of void fraction distribution along radial and vertical directions, considering the impact of wall interactions. Three different samples, spanning particle sizes from 0.3 mm to 6 mm, were used. Results indicated that the number of sub-steps significantly influences void fraction precision, a key criterion for comparing simulations with experimental results. Additionally, the study found that both loosely and densely packed beds of particles could be accurately represented by incorporating appropriate values for rolling friction. This value serves as an indicator of both inter-particle friction and friction between particles and the walls. An optimal rolling friction coefficient has been thereby suggested for the precise representation for the densely packed bed of spherical char particles.

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Section: Introductionmentioning

confidence: 99%

The Impact of Discrete Element Method Parameters on Realistic Representation of Spherical Particles in a Packed Bed

Ghasemi Monfared,

Hellström,

Umeki

2024

Processes

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Optimizing vanadium(V) removal in groundwater: Influence of packing modes in bioreactors with machine learning predictions

Liting,

Hongliang,

Yuanyuan

et al. 2025

Journal of Water Process Engineering

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Influence of particle stacking modes on the fluidization characteristics of biomass particles in binary particle systems

Wang,

Bai,

et al. 2024

Physics of Fluids

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Spouted bed is widely used in biomass combustion and other industrial production due to the advantages of good heat transfer performance and sufficient gas–solid mixing. In order to achieve higher heat and mass transfer performance and conversion efficiency, inert particles are often added to assist in the fluidization of biomass particles. However, the stacking patterns of different particles in a binary particle system can have some effects on particle flow, distribution, and bed stability. Therefore, in this study, the computational fluid dynamics–discrete element method was used to analyze the particle fluidization characteristics under four different particle stacking modes in a spouted bed. The results show that the average bed height of larger spherocylindrical particles is prioritized in binary particle systems. The void fraction of spherocylindrical particles tends to increase in the near-wall region, whereas spherical particles tend to decrease. When the binary particles are mixed at the initial moment, the change rule of vertical velocity of the two particles remains consistent. In addition, the vertical velocities of two kinds of particles when layered stacking is used are gradually close to each other only after a period of time. In addition, the orientation angle of the spherocylindrical particles in the spouted bed tends to be horizontal for both the single-component spherocylindrical particle system and the wall effect attenuates this phenomenon.

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Effect of Packing Structure Evolution on the Flow Characteristics in a Binary Composite Packed Bed Based on DEM-CFD Method

Cited by 3 publications

References 48 publications

The Impact of Discrete Element Method Parameters on Realistic Representation of Spherical Particles in a Packed Bed

The Impact of Discrete Element Method Parameters on Realistic Representation of Spherical Particles in a Packed Bed

Optimizing vanadium(V) removal in groundwater: Influence of packing modes in bioreactors with machine learning predictions

Influence of particle stacking modes on the fluidization characteristics of biomass particles in binary particle systems

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