Analysis of methodologies for determination of DEM input parameters

Lima, R. M. C.; Brandão, Rodolfo J.; Santos, Raphael Lima; Duarte, Cláudio Roberto; Barrozo, M. A. S.

doi:10.1007/s43153-021-00107-4

Cited by 12 publications

(2 citation statements)

References 36 publications

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“…The restitution coefficient (e), which quantifies the energy conserved in shocks between solid bodies, can be experimentally measured by the ratio between the relative velocities after (V 1 ) and before (V 0 ) the impact of two colliding bodies (Lima et al, 2021;Machado et al, 2017;Marinack Jr. et al, 2013), as shown in Eqn. ( 14):…”

Section: Measurement Of Dem Input Parametersmentioning

confidence: 99%

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Effects of DEM Parameters and Operating Conditions on Particle Dynamics in a Laboratory Scale Rotating Disc

Lima,

Souza,

Brandão

et al. 2024

KONA

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Rotating discs are usually used as granulators in many industrial processes. The efficiency of the granulation process in this device is directly related to the particle motion behavior in different flow regimes. In this work, the granular flow in a rotating disc was investigated experimentally and numerically. The Discrete Element Method (DEM) was used in the simulations, while Central Composite Designs (CCD) were employed to quantify the effects of DEM input parameters and operating conditions (filling degree (FD), angle of inclination (AI), and rotational speed) on the contacts between particles. The results showed that the particle-wall static friction coefficient had the most significant impact on the studied response. Additionally, the effect of operating variables on the collision force between particles, the angle of departure and particle velocities was successfully investigated, with corresponding DEM simulation predictions. It was also verified that the simulations performed with experimentally measured DEM input parameter values were able to reproduce the flow regimes in the rotating disc.

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Section: Measurement Of Dem Input Parametersmentioning

confidence: 99%

“…The particle-particle interaction behavior was studied by covering the surface of the plane with a fixed granular bed of glass beads. (Brandao et al, 2020;Lima et al, 2021).…”

Section:  mentioning

confidence: 99%

Effects of DEM Parameters and Operating Conditions on Particle Dynamics in a Laboratory Scale Rotating Disc

Lima,

Souza,

Brandão

et al. 2024

KONA

Self Cite

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Sustainable dye extraction: Annatto powder production in a fountain confined spouted bed

Almeida,

Duarte,

Tellabide

et al. 2024

Can J Chem Eng

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This study proposes an efficient and sustainable process for annatto powder production using a fountain confined spouted bed. With widespread applications in industries such as food, pharmaceuticals, and cosmetics, conventional extraction methods face environmental and economic challenges. Our study explores a solvent‐free and eco‐friendly approach using mechanical attrition within a fountain confined spouted bed, offering a cost‐effective solution for annatto cultivation. We systematically investigated the impact of four parameters—fountain confiner position and length, draft tube diameter, and airflow velocity—employing experimental design, multiple regression analysis, particle swarm optimization, and computational fluid dynamics–discrete element method (CFD‐DEM) simulations. The proposed optimization condition shows significantly higher collision intensity, improving annatto powder production compared to other central composite design tests. This study contributes to developing of a sustainable and economically viable method for dye production, with potential implications for annatto‐producing regions globally.

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