A new method for the determination of particle contact stiffness

Paulick, M.; Morgeneyer, Martin; Kwade, Arno

doi:10.1007/s10035-014-0537-x

Cited by 27 publications

(17 citation statements)

References 38 publications

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“…There are a number of input parameters that need to be tuned depending on the contact model used; this procedure is known as calibration. An in-depth review into calibration is provided by [42][43][44][45]. If Luding's [17] original contact model is to be used, a total of 19 input parameters must be predefined or calibrated.…”

Section: Methodsmentioning

confidence: 99%

Modeling of High-Density Compaction of Pharmaceutical Tablets Using Multi-Contact Discrete Element Method

et al. 2021

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The purpose of this work is to simulate the powder compaction of pharmaceutical materials at the microscopic scale in order to better understand the interplay of mechanical forces between particles, and to predict their compression profiles by controlling the microstructure. For this task, the new framework of multi-contact discrete element method (MC-DEM) was applied. In contrast to the conventional discrete element method (DEM), MC-DEM interactions between multiple contacts on the same particle are now explicitly taken into account. A new adhesive elastic-plastic multi-contact model invoking neighboring contact interaction was introduced and implemented. The uniaxial compaction of two microcrystalline cellulose grades (Avicel® PH 200 (FMC BioPolymer, Philadelphia, PA, USA) and Pharmacel® 102 (DFE Pharma, Nörten-Hardenberg, Germany) subjected to high confining conditions was studied. The objectives of these simulations were: (1) to investigate the micromechanical behavior; (2) to predict the macroscopic behavior; and (3) to develop a methodology for the calibration of the model parameters needed for the MC-DEM simulations. A two-stage calibration strategy was followed: first, the model parameters were directly measured at the micro-scale (particle level) and second, a meso-scale calibration was established between MC-DEM parameters and compression profiles of the pharmaceutical powders. The new MC-DEM framework could capture the main compressibility characteristics of pharmaceutical materials and could successfully provide predictions on compression profiles at high relative densities.

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Section: Methodsmentioning

confidence: 99%

Modeling of High-Density Compaction of Pharmaceutical Tablets Using Multi-Contact Discrete Element Method

et al. 2021

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“…Cases of nanoparticle exposure in the field of occupational hygiene by coating workplaces have been reported [ 22 ]. These exposures can occur also when using powders [ 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Advanced Biofuels Based on Fischer–Tropsch Synthesis for Applications in Gasoline Engines

et al. 2021

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The aim of the article is to determine the properties of fuel mixtures of Fischer–Tropsch naphtha fraction with traditional gasoline (petrol) to be able to integrate the production of advanced alternative fuel based on Fischer–Tropsch synthesis into existing fuel markets. The density, octane number, vapor pressure, cloud point, water content, sulphur content, refractive index, ASTM color, heat of combustion, and fuel composition were measured using the gas chromatography method PIONA. It was found that fuel properties of Fischer–Tropsch naphtha fraction is not much comparable to conventional gasoline (petrol) due to the high n-alkane content. This research work recommends the creation of a low-percentage mixture of 3 vol.% of FT naphtha fraction with traditional gasoline to minimize negative effects—similar to the current legislative limit of 5 vol.% of bioethanol in E5 gasoline. FT naphtha fraction as a biocomponent does not contain sulphur or polyaromatic hydrocarbons nor benzene. Waste materials can be processed by FT synthesis. Fischer–Tropsch synthesis can be considered a universal fuel—the naphtha fraction cut can be declared as a biocomponent for gasoline fuel without any further necessary catalytic upgrading.

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“…Cases of nanoparticle exposure in the field of occupational hygiene in coating workplaces have been reported [ 36 ]. These exposures can occur also when using powders [ 37 , 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Advanced Biofuels Based on Fischer–Tropsch Synthesis for Applications in Diesel Engines

et al. 2021

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This paper focuses on the evaluation of the fuel properties of Fischer–Tropsch diesel blends with conventional diesel. Incorporating this advanced fuel into conventional diesel production will enable the use of waste materials and non-food materials as resources, while contributing to a reduction in dependence on crude oil. To evaluate the suitability of using Fischer–Tropsch diesel, cetane number, cetane index, CFPP, density, flash point, heat of combustion, lubricity, viscosity, distillation curve, and fuel composition ratios using multidimensional GC × GC-TOFMS for different blends were measured. It was found that the fuel properties of the blended fuel are comparable to conventional diesel and even outperform conventional fuel in some parameters. All measurements were performed according to current standards, thus ensuring the repeatability of measurements for other research groups or the private sector.

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A new method for the determination of particle contact stiffness

Cited by 27 publications

References 38 publications

Modeling of High-Density Compaction of Pharmaceutical Tablets Using Multi-Contact Discrete Element Method

Modeling of High-Density Compaction of Pharmaceutical Tablets Using Multi-Contact Discrete Element Method

Advanced Biofuels Based on Fischer–Tropsch Synthesis for Applications in Gasoline Engines

Advanced Biofuels Based on Fischer–Tropsch Synthesis for Applications in Diesel Engines

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