[PDF] Top 20 Impact of shape representation schemes used in discrete element modelling of particle packing

... bulk packing densities (excluding end effects) of the voxel-based, the CT-scanned bed and the eight cylinder representations formed using the sphere-composite method are compared in Table ...common: ... See full document

... was used to examine and quantify the structures of the porous ...those used in ...in shape and do not undergo distortion during filling and infiltration, it was deemed that this approach should yield ... See full document

... some modelling challenges in obtaining stability. The principal data used is shown in Table 1 and example figures illustrating filling and packing are shown in ...of particle orientations as ... See full document

... that discrete element method modelling (DEM) of rock size reduction can be achieved by two approaches: the population balance model (PBM) and the bonded particle model ...successfully ... See full document

... Important issues of ICP algorithm are the speed of computation and the accuracy for 3D shape representation. The speed of the algorithm is crucial for many applications. When the number of points is very ... See full document

... in Li et al [31]. The nodes of the scanned surface are then input to PFC5.0 in the form of STL file. In terms of calculating the inertia tensor, the particle is assumed to have uniform density, the input surface ... See full document

... strengths of 37.5 and 75.0 MPa. The unbonded simulation readily compacts to a denser state when a low vertical stress is applied, hence appears to start at a lower voids ratio; the parallel bonds in the bonded samples ... See full document

... particles in DEM shows a smooth distribution with a peak frequency of the velocity distribution lower.. than PEPT and DEM tracer.[r] ... See full document

... Fig. 1. Schematic diagram of the material movement in the ball mill. Fig. 2. Motion trajectory of a particle in the outermost layer of the mill. Fig. 3. (a) Particles in the physical model; (b) particles in the ... See full document

... observed discrete data independently of the sampling interval, enabling Granger causality relationships to be preserved, and thereby facilitates obtaining efficient estimates of the structural parameters that are ... See full document

... The mean temperature on the outer diameter has been chosen because it is the one that is easy to calculate during service. Usually, the convection coefficient between the sheathed element and the fluid to be ... See full document

... ‘civilization diseases’. Cardiovascular diseases, cancer, diabetes and obesity are the main assassins of modern populations of the developed North (Aldoori et al., 1997; Rowland, 2001; Kritchevsky, 2001; Burkitt, 1995). ... See full document

... of particle shape on mass eroded has been reported by many researchers [20, ...of impact velocity and surface and particle ...angular particle erosivity increased with particle ... See full document

... based particle methods are the most widely used technique for simulating ...first particle algorithm is generally considered to be the Smooth Particle Hydrodynamics (SPH) method which was ... See full document

... analyze discrete particle materials proposed by Professor Cundall in 1971 [13] ...widely used in the study of powder dynamics in complex physical fields, material mechanical properties with more ... See full document

... the shape of sand particles affects the results of particle size distribution obtained by the laser diffraction ...the shape of the investigated particles influences particle size distribution ... See full document

... are used extensively to build shape descriptions in medial axis (Blum, 1967), and its successors such as shock graphs (Siddiqi et ...a shape descriptor can guide the search over exponentially many ... See full document

... Powder technology is known as a superior way of producing high quality components for various applications since the last 20 years [MPIF, 2008]. It offers a lot of advantages over other metalworking technology. It ... See full document

... static representation of respondent uncertainty, which differs somewhat from the dynamic effects in CA, where choices are consistent over time, leading to reduced randomness with more ... See full document

... distinct particle changes their position by free rigid body motion or by contacting with neighbour particles or ...Each particle may be in contact with other ... See full document