Investigation of rice grain flow by multi-sphere particle model with rolling resistance

A multi-sphere (MS) model combined with rolling friction was considered for modelling elongated particles of irregular shape. The performance of the model was investigated by numerical simulations of the rice grain flow. A set of 5000 poly-dispersed milled rice grains were selected for the investigation purposes. They were characterised by a constant aspect ratio 3.5, while their maximum size was ranging from 6.4 to 7.3 mm. Filling and discharge flow as well as piling were simulated numerically with and without rolling resistance of particles. Simulation results were validated on the basis of experimental results. Good agreement of numerical and experimental results in terms of the discharge time and repose angle of the pile was reached simultaneously, when rolling resistance was introduced.

[1]  W. Yang,et al.  Mechanical properties of sound and fissured rice kernels and their implications for rice breakage , 2005 .

[2]  A. Yu,et al.  Rolling friction in the dynamic simulation of sandpile formation , 1999 .

[3]  S. Luding.  Cohesive, frictional powders: contact models for tension , 2008 .

[4]  Shotaro Kawakami,et al.  Numerical Simulation of the shaking separation of paddy and brown rice using the discrete element method , 2001 .

[5]  M. Oda,et al.  Micro-Deformation Mechanism of Shear Banding Process Based on Modified Distinct Element Method , 1999 .

[6]  Mohammad Hossein Abbaspour-Fard,et al.  Theoretical Validation of a Multi-sphere, Discrete Element Model Suitable for Biomaterials Handling Simulation , 2004 .

[7]  Bernhard Peters,et al.  An approach to simulate the motion of spherical and non-spherical fuel particles in combustion chambers , 2001 .

[8]  Yutaka Tsuji,et al.  Lagrangian numerical simulation of plug flow of cohesionless particles in a horizontal pipe , 1992 .

[9]  P. Cundall,et al.  A discrete numerical model for granular assemblies , 1979 .

[10]  R. Kačianauskas,et al.  Investigation of adequacy of multi-sphere approximation of elliptical particles for DEM simulations , 2010 .

[11]  Y. Nishiyama,et al.  Compressive strength properties of rough rice considering variation of contact area , 2002 .

[12]  Mohammad Hossein Abbaspour-Fard,et al.  Shape representation of axi‐symmetrical, non‐spherical particles in discrete element simulation using multi‐element model particles , 1999 .

[13]  C. J. Coetzee,et al.  Calibration of discrete element parameters and the modelling of silo discharge and bucket filling , 2009 .

[14]  A. Yu,et al.  Discrete particle simulation of particulate systems: Theoretical developments , 2007 .

[15]  Algirdas Maknickas,et al.  Parallel discrete element simulation of poly-dispersed granular material , 2010, Adv. Eng. Softw..

[16]  J. F. Favier,et al.  Model for the deformation in agricultural and food particulate materials under bulk compressive loading using discrete element method. II: Compression of oilseeds , 2004 .

[17]  Fernando Alonso-Marroquín,et al.  An efficient algorithm for granular dynamics simulations with complex-shaped objects , 2008 .

[18]  J. Ooi,et al.  Experiments and simulations of direct shear tests: porosity, contact friction and bulk friction , 2008 .

[19]  Hai-Sui Yu,et al.  A novel discrete model for granular material incorporating rolling resistance , 2005 .

[20]  Manoj Khanal,et al.  Discrete Element Method Simulation of Effect of Aggregate Shape on Fragmentation of Particle Composite , 2008 .

[21]  A. Tordesillas,et al.  Incorporating rolling resistance and contact anisotropy in micromechanical models of granular media , 2002 .

[22]  Jin Y. Ooi,et al.  Numerical investigation of progressive development of granular pile with spherical and non-spherical particles , 2009 .

[23]  Aibing Yu,et al.  Steady-state granular flow in a three-dimensional cylindrical hopper with flat bottom: microscopic analysis , 2004 .

[24]  H. J. Herrmann,et al.  Influence of particle shape on sheared dense granular media , 2006 .

[25]  Peter Wriggers,et al.  A contact detection algorithm for superellipsoids based on the common-normal concept , 2008 .

[26]  Algirdas Maknickas,et al.  Investigation of performance of programming approaches and languages used for numerical simulation of granular material by the discrete element method , 2006, Comput. Phys. Commun..

[27]  Harald Kruggel-Emden,et al.  A study on the validity of the multi-sphere Discrete Element Method , 2008 .

[28]  T. Liebling,et al.  Three-dimensional distinct element simulation of spherocylinder crystallization , 2005 .

[29]  Zenon Mróz,et al.  Discrete-particle investigation of friction effect in filling and unsteady/steady discharge in three-dimensional wedge-shaped hopper , 2008 .

[30]  J. Favier,et al.  Model for the deformation in agricultural and food particulate materials under bulk compressive loading using discrete element method. I: Theory, model development and validation , 2004 .