Evaluation of the significance of the contact model particle parameters in the modelling of wet soils by the discrete element method

Мударисов, Салават; Farkhutdinov, Ildar; Khamaletdinov, Rim; Khasanov, Eduard; Mukhametdinov, Airat

doi:10.1016/j.still.2021.105228

Cited by 45 publications

(9 citation statements)

References 15 publications

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“…This increase might be attributed to the enhanced cohesion between pellets as moisture content rises. Additionally, the static friction coefficient of P–P interactions is greater than that of P–S because the former has a more significant surface roughness compared to the latter (Bahrami et al., 2020; Mudarisov et al., 2022; Shaikh et al., 2021). Both rolling and static friction coefficients follow a similar trend with moisture content, increasing from 0.080 to 0.132 for P–S and from 0.099 to 0.143 for P–P collisions.…”

Section: Resultsmentioning

confidence: 99%

Measurement and calibration of gluten pellets discrete element parameters at varied moisture content

Ben,

Sun,

Zhu

et al. 2024

Journal of Food Science

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To quickly calibrate the discrete element parameters (DEP) of pellets with different moisture content (MC), the angle of repose (AoR) was taken as the target value to conduct experimental and simulation research on gluten pellets. The experimental method obtained the intrinsic parameters, contact parameters, and AoR of pellets with different moisture content. The parameters differed significantly under different moisture content (p < 0.05). The AoR‐MC model (R2 = 0.987) was established. The Plackett–Burman test, steepest ascent test, and center compound test were carried out to establish the AoR‐DEP model (R2 = 0.969) with a relative error less than or equal to 2.07%. The MC‐DEP model was derived, and verified by the side plate lifting method with a relative error less than or equal to 2.58%. This paper provides a new method for calibrating DEP under different moisture content.

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Section: Resultsmentioning

confidence: 99%

Measurement and calibration of gluten pellets discrete element parameters at varied moisture content

Ben,

Sun,

Zhu

et al. 2024

Journal of Food Science

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“…Although the lifting cylinder test is the most commonly used angle of repose test, other methods, such as the pouring method, are available. Material is poured from a funnel, hopper, or bin at a fixed or variable height onto a pile, from where the angle can be measured; see [93,[97][98][99][100][101][102][103][104] for examples. However, compared to the lifting cylinder test, these tests might be even less suited for cohesive materials.…”

Section: Methodology 2: Lifting Cylinder Testsmentioning

confidence: 99%

Review: The Calibration of DEM Parameters for the Bulk Modelling of Cohesive Materials

Coetzee

Scheffler

2022

Processes

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Granular materials are abundant in nature, and in most industries, either the initial constituents or final products are in granular form during a production or processing stage. Industrial processes and equipment for the handling of bulk solids can only be improved if we can understand, model and predict the material behaviour. The discrete element method (DEM) is a numerical tool well-suited for this purpose and has been used by researchers and engineers to analyse various industrial applications and processes. However, before any bulk scale modelling can be undertaken, the input parameters must be carefully calibrated to obtain accurate results. The calibration of parameter values for non-cohesive materials has reached a level of maturity; however, the calibration of cohesive materials requires more research. This paper details the most prevalent contact models used to model cohesive materials—presented in a consistent notation. Moreover, the significant differences between the models are highlighted to provide a reference for engineers and researchers to select the most appropriate model for a specific application. Finally, a critical review of calibration experiments and methodologies often used for cohesive materials is also presented. This provides a solid basis for DEM practitioners to select the most appropriate calibration methodology for their application and for researchers to extend the current state-of-the-art practices.

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“…This study focuses on the production of granular fertilizers with caked fertilizers in practice and requires separate models for caking fertilizers and granular fertilizer mixes. In order to investigate the crushing characteristics of fertilizer particles, the Bonded particle method (BPM) was used to develop a discrete element model of fertilizer particles by bonding multiple small spherical filled particles of equal diameter into a lumpy fertilizer using a Bond key [21,22]. The input parameters for the BPM are obtained from the uniaxial compression test, which has been used extensively to determine the microscopic parameters of the grains.…”

Section: Model Base Parameter Determinationmentioning

confidence: 99%

Simulation Analysis and Test of Gap Squeeze Gear Type Fertilizer Discharger for Granular Fertilizer Containing Caking

Dun

Mao

et al. 2023

Preprint

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Precision fertilizer application technology is necessary to improve fertilizer utilization efficiency in agricultural production. To achieve precision fertilizer application and solve problems in production practice that contain the structure problem of the traditional mechanical fertilization systems, and the fertilizer discharger is blocked and can not achieve uniform fertilization because the fertilizer contains caking fertilizer in response to the characteristics of conventional fertilizers containing caking fertilizers, innovative design and system experimental simulation studies were carried out. A gap squeeze gear-type fertilizer dis-charger was designed, and fertilizer caking crushing was achieved by configuring the gear gap squeezing method. Combined with engineering practice, two mixed fertilizers (granular fertilizer with caking fertilizer) were constructed and blended by using BPM (Hertz Mindlin with bonding) discrete element, the fertilizer discharger was used as the object of study to simulate and experimentally investigate the process of crushing and discharging of mixed fertilizer and the process of uniform discharging of mixed fertilizer. The simulation test model of the separation device with vibration screen of the caking fertilizer and granular fertilizer after fertilizing was established to study the crushing rate of the caking fertilizer, and the simulation model with collection plate of the uniformity of the mixed fertilizer discharge was based on to explore the uniformity of the mixed fertilizer. The L9 (34) orthogonal test was carried out under the conditions with the number of teeth, pressure angle, and fertilization gap as test factors and the fertilizer crushing rate and fertilizer uniformity coefficient as test indicators. The test results showed that the number of teeth and pressure angle had significant effects (0.01 < P < 0.05) on the crushing fertilizer rate and fertilizer uniformity, and the fertilization gap had no significant impact (P༞0.05) on the crushing fertilizer rate and fertilizer uniformity. In the optimal combination of parameters, the number of teeth 6, pres-sure angle 15 °, fertilization gap 6mm operation, the coefficient of uniformity of crushing fertilizer rate and fertilizer uniformity were 74.89% and 17.21%, respectively. The bench test results compared with the outer groove wheeled fertilizer drainer showed that the optimized gap squeeze gear type fertilizer discharger has higher fertilizer crushing quality at different speeds, and the fertilizer crushing rate and uniformity were79.69% and 18.56%, respectively, within the error range. The simulation results are in general agreement. This study provides evidence for fertilizer discharger structure design and enhances the effect of fertilizer discharger crushing.

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Evaluation of the significance of the contact model particle parameters in the modelling of wet soils by the discrete element method

Cited by 45 publications

References 15 publications

Measurement and calibration of gluten pellets discrete element parameters at varied moisture content

Measurement and calibration of gluten pellets discrete element parameters at varied moisture content

Review: The Calibration of DEM Parameters for the Bulk Modelling of Cohesive Materials

Simulation Analysis and Test of Gap Squeeze Gear Type Fertilizer Discharger for Granular Fertilizer Containing Caking

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