Repose angle of monoparticles and binary mixture: An experimental and simulation study

Cunha, Renata Nepomuceno Da; Santos, Kássia Graciele dos; Lima, Rodrigo Nobis da Costa; Duarte, Cláudio Roberto; Barrozo, M. A. S.

doi:10.1016/j.powtec.2016.09.023

Cited by 68 publications

(29 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This shows that the linear relationships postulated in Eqs. (5) and (9) are justified. The straight lines approximating the unloading moduli, however, intersect the vertical axis above the point representing the loading stiffness according to the Storåkers model calculated in the previous section.…”

Section: Analysis Of the Unloading Modelmentioning

confidence: 98%

See 1 more Smart Citation

Numerical and experimental investigation of an elastoplastic contact model for spherical discrete elements

et al. 2018

View full text Add to dashboard Cite

A contact model for the normal interaction between elastoplastic spherical discrete elements has been investigated in the present paper. The Walton-Braun model with linear loading and unloading has been revisited. The main objectives of the research have been to validate the applicability of the linear loading and unloading models and estimate the loading and unloading stiffness parameters. The investigation has combined experimental tests and finite element simulations. Both experimental and numerical results have proved that the interaction between the spheres subjected to a contact pressure inducing a plastic deformation can be approximated by a linear relationship in quite a large range of elastoplastic deformation. Similarly, the linear model has been shown to be suitable for the unloading. It has been demonstrated that the Storåkers model provides a good evaluation of the loading stiffness for the elastoplastic contact and the unloading stiffness can be assumed as varying linearly with the deformation of the contacting spheres. The unloading stiffness can be expressed in a convenient way as a function of the Young's modulus and certain scaling factor dependent on the dimensionless parameter defining the level of the sphere deformation.

show abstract

Section: Analysis Of the Unloading Modelmentioning

confidence: 98%

“…A simple contact model consisting of a linear spring in parallel with a viscous damping element proposed in the pioneering work by Cundall and Strack [4] is still very popular in DEM simulations [3,7,16]. A nonlinear elastic interaction is included in the contact models based on the Hertz theory [5,11,25].…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of an elastoplastic contact model for spherical discrete elements

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In [27], authors investigated geometrical and velocity characteristics of flow patterns of granular fill of the rotating chamber, a wide range of variations of parameters of the system, which were obtained when applying the Euler's multiphase model of the DEM method and by running a visual analysis of data acquired from high-speed video recording. The results of determining a position of the free surface of flow patterns of mono-and two-dispersed granular fill in a slow-rotating chamber, which were obtained by using video recording and calculated by applying the DEM method, are given in [28]. In paper [29], authors compared results of research into flow patterns of the ball fill of a rotating chamber under cascade, cataract, and centrifuge modes, which were received by employing the method of computational fluid dynamics in the Euler's statement and visual analysis of video recording data.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Modeling a flow pattern of the granular fill in the cross section of a rotating chamber

Naumenko

2017

EEJET

View full text Add to dashboard Cite

“…The resulting static and dynamic behavior of a particulate material as a whole is the most important [15][16][17][18]. One of the most commonly used techniques for describing complex particle geometries involves merging multiple spherical surfaces into the shape of a particle [19][20][21][22] and/or using superquadric particles [23]. Thus, a variety of multisphere particles can be utilized with respect to computational efficiency [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

DEM Investigation of the Influence of Particulate Properties and Operating Conditions on the Mixing Process in Rotary Drums: Part 1—Determination of the DEM Parameters and Calibration Process

et al. 2020

View full text Add to dashboard Cite

This paper’s goal was to select methods and a calibration procedure which would lead to the determination of relevant parameters of a discrete element method (DEM) and virtual material creation. Seven particulates were selected with respect to their shape (spherical and non-spherical), size and density. The first calibration experiment involved “packing test” to determine the shape accuracy and bulk density of virtual packed particulates. The series of simulations were compared with real experiments, and the size, shape and density of virtual particles were optimized. Using three apparatuses, the input parameter values were experimentally determined for a contact model that defines the behavior of particulates in DEM simulations. The research part of the paper examines the influence of factors such as particle number; pile formation method; and the method of evaluation of the angle of repose on the process of the calibration of virtual material. The most reproducible results were achieved by the “pilling” method and by the rotating drum—both evaluated by the geometric method. However, it is always advisable to make an overall visual comparison of the slope shape between the calibration simulation and the experimental curves. The bowl’s diameter to particle size ratio should be greater than 25, and the calibration experiment should contain approximately 4000 particles to ensure representative results during angle of repose calibration experiment.

show abstract

Repose angle of monoparticles and binary mixture: An experimental and simulation study

Cited by 68 publications

References 32 publications

Numerical and experimental investigation of an elastoplastic contact model for spherical discrete elements

Numerical and experimental investigation of an elastoplastic contact model for spherical discrete elements

Modeling a flow pattern of the granular fill in the cross section of a rotating chamber

DEM Investigation of the Influence of Particulate Properties and Operating Conditions on the Mixing Process in Rotary Drums: Part 1—Determination of the DEM Parameters and Calibration Process

Contact Info

Product

Resources

About