Validation and experimental calibration of 3D discrete element models for the simulation of the discharge flow in silos

González-Montellano, C.; Ramírez, Álvaro; Gallego, E.; Ayuga, Francisco

doi:10.1016/j.ces.2011.07.009

Cited by 165 publications

(53 citation statements)

References 43 publications

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“…In recent years, the drastic increase in affordable computational power has allowed DEM simulations to become a versatile tool for industrial applications (2). DEM simulations have been used in various industrial fields to study processes such as mixing (3), granule breakage (4), silo filling and discharge (5,6), or milling (7). In the pharmaceutical industry, DEM simulations have been applied for nearly all major particulate processes.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Tablet Properties for Discrete Element Modeling of an Active Coating Process

et al. 2013

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Abstract. Coating of solid dosage forms is an important unit operation in the pharmaceutical industry. In recent years, numerical simulations of drug manufacturing processes have been gaining interest as process analytical technology tools. The discrete element method (DEM) in particular is suitable to model tabletcoating processes. For the development of accurate simulations, information on the material properties of the tablets is required. In this study, the mechanical parameters Young's modulus, coefficient of restitution (CoR), and coefficients of friction (CoF) of gastrointestinal therapeutic systems (GITS) and of activecoated GITS were measured experimentally. The dynamic angle of repose of these tablets in a drum coater was investigated to revise the CoF. The resulting values were used as input data in DEM simulations to compare simulation and experiment. A mean value of Young's modulus of 31.9 MPa was determined by the uniaxial compression test. The CoR was found to be 0.78. For both tablet-steel and tablet-tablet friction, active-coated GITS showed a higher CoF compared with GITS. According to the values of the dynamic angle of repose, the CoF was adjusted to obtain consistent tablet motion in the simulation and in the experiment. On the basis of this experimental characterization, mechanical parameters are integrated into DEM simulation programs to perform numerical analysis of coating processes.

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Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Tablet Properties for Discrete Element Modeling of an Active Coating Process

et al. 2013

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“…In this paper the applicability of DEM model in case of mass flow and funnel flow is examined. Our numerical discharge model was created with a modification of other works [14][15][16][17][18][19] then it was validated with laboratory experiments, finally the numerical results were compared with analytical and experimental results. Both of the simulations and outflow measurements were carried out with wheat.…”

Section: Introductionmentioning

confidence: 99%

Extension of silo discharge model based on discrete element method

Oldal

Safranyik

2015

J Mech Sci Technol

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Silos are containers used by almost all fields of industry for storing granular materials and generally classified in two types: mass flow and funnel flow. One of the most important design parameter of these equipment is the discharge rate which depends on the flow mode. There are high numbers of analytical and empirical models used for determine this parameter, however none of them is suitable for both flow modes; moreover the accuracy of mass flow models is not acceptable. Recently a few numerical discharge models are made for certain geometries; but the applicability of these models in case of different flow modes was not examined. Aim of our work is the creation of an experimentally validated numerical discharge model based on others work and examination of this in term of different flow modes. We prove that our modified model is suitable for determine silos discharge rate independently from flow mode.

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“…The use of the DEM alone does not necessarily have the correct predicative value without previous knowledge from measurements on investigated equipment. Cali- bration and validation of the equipment's DEM model is important and this is not objective without measurement on realistic equipment [23,24].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Material Flow Through a Sample Divider

Rozbroj¹,

Nečas²,

Žurovec³

et al. 2018

Adv. Sci. Technol. Res. J.

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The prerequisite for a modern approach to innovative procedures of the development of current or even newly created equipment for the transport of particulate materials is the utilization of simulation methods, such as the Discrete Element Method (DEM). This article focuses on the basic, or initial, validation of movement of material through the sample divider. The mechanical-physical properties of brown coal were measured. Based on these parameters the preliminary input values for EDEM Academic were selected, and a simulation of the dividing process was run. The key monitored parameters included density and friction coefficient. Experiments on a realistic model of the equipment were performed and assessed. The total weights of brown coal at the exit from the divider were determined for a specific speed of the divider. The aim of this task was to simulate the realistically determined weight division of the brown coal sample. The result from the DEM was compared with the results of measurement on a realistic model.

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Validation and experimental calibration of 3D discrete element models for the simulation of the discharge flow in silos

Cited by 165 publications

References 43 publications

Experimental Analysis of Tablet Properties for Discrete Element Modeling of an Active Coating Process

Experimental Analysis of Tablet Properties for Discrete Element Modeling of an Active Coating Process

Extension of silo discharge model based on discrete element method

Simulation of Material Flow Through a Sample Divider

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