Abstract Models that introduce rolling resistance at the contact are widely employed in simulations using discrete element method (DEM) to indirectly represent particle shape effects. This approach offers substantial computational benefits price of increased calibration complexity. work proposes a simplify resistance. The key is an empirical relation between parameter (rolling friction) and 3D ...

as a first step towards mechanization related to any product, including date fruit, it is necessary to have comprehensive information about the product. physical and mechanical properties are needed for the design of post harvest machinery and equipment. the objective of this study was to determine and compare some physical properties such as dimension, mass and volume, particulate density, pit...

in this study, some seed physical properties of two sugar beet varieties, shirin and gadouk (436), were evaluated as a function of moisture content. physical properties included length, width, thickness, arithmetic and geometric mean diameters, sphericity, thousand seed weight, angle of repose, terminal velocity, true density, bulk density, porosity, and coefficient of friction. four moisture c...

Dynamic recrystallization is an important mechanical weakening mechanism during the deformation of ice, yet we currently lack robust quantitative tools for identifying recrystallized grains in “migration” regime that dominates ice at temperatures close to melting point. Here, propose grain boundary irregularity as a means discriminating between (high sphericity, low irregularity) and remnant (l...

When dealing with powders, a fundamental knowledge of their physical parameters is indispensable, different methods and approaches proposed in literature. Results obtained differ widely it important to define standards be applied, both toward the investigation interpretation experimental results. The present research intends propose such standards, while defining general rules respected. Firstl...

Adding basalt fiber into concrete can significantly improve its mechanical properties. In order to explore the influence of content on uniaxial compressive strength and splitting tensile mechanism action, this paper conducts tests three kinds specimens with different obtains relationship between macro properties content. At same time, help CT scanning equipment digital image processing technolo...

Tortuosity in packed beds or porous media is of significant interest many fields, from geoscience to the chemical industry. plays a role mass transport media, but also their residual thermal electric conductivity when particles are not conducting. Several predictive models have been proposed evaluate tortuosity, there still gap it comes considering various particle shapes. The preponderance tor...

Two varieties of Pearl millet seeds (Penisetum glaucum) (Ex-Borno and SOSAT C88) were obtained from the Lake Chad Research Institute, Maiduguri-Nigeria and reconditioned to moisture contents ranging from 10% 20% w.b. The reconditioned seeds were then evaluated for dimensions, sphericity, bulk density, solid density, porosity, thousand seed mass, angle of repose and static coefficient of frictio...