Effect of rolling friction on wall pressure, discharge velocity and outflow of granular material from a flat-bottomed bin--颗粒学报PARTICUOLOGY

Balevičius, R., Sielamowicz, I., Mróz, Z., & Kačianauskas, R. (2012). Effect of rolling friction on wall pressure, discharge velocity and outflow of granular material from a flat-bottomed bin. Particuology, 10(6), 672–682. https://doi.org/10.1016/j.partic.2012.07.002

Effect of rolling friction on wall pressure, discharge velocity and outflow of granular material from a flat-bottomed bin

R. Balevičius ^a, I. Sielamowicz ^b, Z. Mróz ^c, R. Kačianauskas ^d *

a Department of Reinforced Concrete and Masonry Structures, Vilnius Gediminas Technical University, av. Sauletekio 11, LT-10223 Vilnius, Lithuania
b Composite Silo Systems ORCHIDEA, st. J. Matejki 8, 15-196 Bialystok, Poland
c Institute of Fundamental Technological Research, Polish Academy of Sciences, st. Pawińskiego 5b, 02-106 Warsaw, Poland
d Institute of Mechanics, Vilnius Gediminas Technical University, st. J. Basanavičiaus. 28, LT-10223 Vilnius, Lithuania

10.1016/j.partic.2012.07.002

Volume 10, Issue 6, December 2012, Pages 672-682

Received 19 January 2012, Revised 29 May 2012, Accepted 28 July 2012, Available online 12 November 2012.

E-mail: rkac@vgtu.lt

Highlights

► DEM vs. experiment analysis of the filling and discharge processes in a bin is highlighted.

► A granular aggregate was represented by 20,400 pea grains.

► Real material properties were established experimentally at the micro and bulk levels.

► DEM model with rolling friction provided accurate prediction of wall stress and outflow parameter.

Abstract

The present paper provides both experimental and DEM analyses of the filling and discharge of pea grains from a 3D flat-bottomed bin. In the DEM model, the fixed mean values of the experimentally determined single particle data, such as the particle density, Young's modulus, Poisson's ratio as well as the sliding and rolling friction coefficients were incorporated to analyse their effects on the macroscale indicators, such as the wall pressure, discharge velocities and material outflow parameters. The effect of rolling friction was studied based on the experimentally measured single particle rolling friction coefficient. This analysis is aimed at the quantitative prediction of flow parameters as related to the identification of material parameters.

Graphical abstract

Keywords

Visco-elastic granular material; Discrete element method; Rolling friction; Wall pressure; Material velocity; Outflow mass; Outflow rate; Biosystems; Pea grains

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