Numerical Experiment of Thermoset Particles in Surface Modification System with Discrete Element Method (Quantization of Cohesive Force Between Particles by Agglomerates Analysis)

Kuwagi, Kenya; Mokhtar, Muhammad Arif Bin; Okada, Hiroyuki; Hirano, Hirohiko; Takami, Toshihiro

doi:10.1080/10407780903423965

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…This includes the cohesion (liquid bridge, van der Waals) force model, the lubrication force model and heat transfer model. For 3D SPA model, Kuwagi et al 31 conducted a DEM simulation for a gas-particle dispersion system at high temperature and successfully quantized the cohesive force between thermoset particles.…”

Section: Numerical Technique Governing Equations For Dem Simulationmentioning

confidence: 98%

Validation of the similar particle assembly (SPA) model for the fluidization of Geldart's group A and D particles

et al. 2011

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in Wiley Online Library (wileyonlinelibrary.com).The similar particle assembly (SPA) model proposed for large-scale discrete element method simulation was validated. The SPA model describes the scaling law for the motion of particles in an assembly, which is derived from the equation of motion of a particle. In the SPA model, particles with similar physical or chemical properties are represented by a single particle, which is called the representative particle. The local assembly of particles in the original bed is supposed to be maintained in the bed with the representative particles. The SPA model was validated by numerical simulations of a 2D fluidized bed of noncohesive and cohesive particles. Using the SPA model, the flow behavior of the representative particles of a certain magnification can be made similar to that of the original particles with significantly less computational load. A good approximation of bubble size distribution between the SPA bed and the original bed was obtained.

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Section: Numerical Technique Governing Equations For Dem Simulationmentioning

confidence: 98%

Validation of the similar particle assembly (SPA) model for the fluidization of Geldart's group A and D particles

et al. 2011

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“…In Mokhtar (2012) [59], the Similar Particle Assembly model [20] is integrated with the cohesive liquid bridge force, which is not scaled. Grains have diameter f times that of the particle, with equal density and assuming same velocities.…”

Section: Cohesive Force Modellingmentioning

confidence: 99%

“…In the coarse graining method, the objective is to scale size and parameters, and adapt models, so that the properties at the scale of the represented particles are kept constant. Among the early ideas of coarse-grained DEM, the following approaches can be mentioned: the imaginary sphere model [18], Similar Particle Assembly [19,20], Representative Particle Model [21]; the work of Patankar and Joseph [22], in which one model of the Lagrange treatment of the solid phase is based on a parcel-like DEM model, deserves to be mentioned. The two CG-DEM models that found widespread adoptions were proposed by Sakai et al [23] for pneumatic conveying and by Bierwisch et al [24] in the context of simulation of the cavity filling process.…”

Section: Introductionmentioning

confidence: 99%

Coarse-Grain DEM Modelling in Fluidized Bed Simulation: A Review

2021

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In the last decade, a few of the early attempts to bring CFD-DEM of fluidized beds beyond the limits of small, lab-scale units to larger scale systems have become popular. The simulation capabilities of the Discrete Element Method in multiphase flow and fluidized beds have largely benefitted by the improvements offered by coarse graining approaches. In fact, the number of real particles that can be simulated increases to the point that pilot-scale and some industrially relevant systems become approachable. Methodologically, coarse graining procedures have been introduced by various groups, resting on different physical backgrounds. The present review collects the most relevant contributions, critically proposing them within a unique, consistent framework for the derivations and nomenclature. Scaling for the contact forces, with the linear and Hertz-based approaches, for the hydrodynamic and cohesive forces is illustrated and discussed. The orders of magnitude computational savings are quantified as a function of the coarse graining degree. An overview of the recent applications in bubbling, spouted beds and circulating fluidized bed reactors is presented. Finally, new scaling, recent extensions and promising future directions are discussed in perspective. In addition to providing a compact compendium of the essential aspects, the review aims at stimulating further efforts in this promising field.

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On the scaling law of JKR contact model for coarse-grained cohesive particles

Chen

Elliott

2020

Chemical Engineering Science

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Numerical Experiment of Thermoset Particles in Surface Modification System with Discrete Element Method (Quantization of Cohesive Force Between Particles by Agglomerates Analysis)

Cited by 6 publications

References 26 publications

Validation of the similar particle assembly (SPA) model for the fluidization of Geldart's group A and D particles

Validation of the similar particle assembly (SPA) model for the fluidization of Geldart's group A and D particles

Coarse-Grain DEM Modelling in Fluidized Bed Simulation: A Review

On the scaling law of JKR contact model for coarse-grained cohesive particles

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