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Showing 1 to 13 of 13 for “"Discrete Element Methods"”.
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Measurement of particle interaction properties for the incorporation into Discrete Element Methods
… media. One such numerical tool, the Discrete Element Method (DEM), is a promising technique for predicting the dynamics of charge motion with in a mill. Particle interactions in DEM are calculated by contact force and force displacement laws at each particle contact. These contact …
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Study of unstable rock failures using finite difference and discrete element methods, A
… through the application of various numerical methods. The direction of the current research is to extend these methods and to develop improved numerical tools with which to study unstable failures in underground mining layouts. An extensive study is first conducted on the expression of …
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Direct Simulations of Fluid-Particle Flow in Newtonian and non-Newtonian Fluids Using Coupled Lattice Boltzmann and Discrete Element Methods
Coupled lattice Boltzmann and discrete element methods are employed to investigate a suite of fluid-particle flow problems in both Newtonian and non-Newtonian fluids. First, the rheological properties of finer particle suspensions in a Newtonian fluid are investigated, as the particle shape and …
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Discrete element models for granular materials and rock masses
Discrete element methods (DEMs) are a family of related numerical procedures for solving problems that exhibit gross discontinuous behavior. Many of these methods are capable of analyzing multiple interacting bodies undergoing large displacements and rotations. These methods are suitable for …
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Development and implementation of a combined discrete and finite element multibody dynamics simulation environment
… for numerical simulation capabilities. The discrete element methods (DEM) are numerical techniques that have been specifically developed to facilitate simulations of distinct bodies that interact with each other through contact forces. In DEM the simulated bodies are typically assumed to be …
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A hybrid discrete element and continuum method for multiscale granular media modeling
… effects such as particle size dependence. In discrete element methods (DEM), every grain and the interactions between them are simulated. DEM is accurate but solve time scales poorly with large grain numbers. Here, we present a hybrid simulation scheme, which seeks a best-of-both-worlds …
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Development of Elastic Resistive Force Theory & Applications to Uprooting
… these phenomena can be accurately modeled via discrete element methods and continuum models, this accuracy comes at a great computational cost, especially for large systems. Granular Resistive Force Theory (RFT) is a reduced-order, rateindependent model that has been shown to successfully …
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Magnetically Actuated Microrobots for Tissue Elasticity Mapping in Colorectal Cancer Diagnosis
… patient outcomes; however, current diagnostic methods such as colonoscopy and traditional imaging primarily rely on visual inspection, limiting their effectiveness in detecting early- stage lesions. Recent research highlights increased tumour stiffness due to cellular proliferation and …
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A study of brittle powder compaction using a combined discrete finite element approach
The Discrete Element Method (DEM) is a collection of numerical techniques based on a discontinuum idealisation of a physical system. Discrete Element Methods have been successfully applied to the simulation of the dynamic behaviour of granular media. Using the Finite Element Method to model the …
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Wall Forces, Bulk Flow and Impact Speeds in a Vibratory Finisher: Modeling and Force Measurements
… media. In this work, experimental and numerical methods were employed to investigate the relationship between the container motion and the granular media behavior inside a commercial VF tub. The objectives were to understand the influence of different process parameters on the media motion, to …
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Multi-scale multiphase modelling of granular flows
… chains, which are micro-structural effects. Discrete element methods (DEM) are capable of simulating these micro-structural effects, however they are computationally expensive. In the present study, a multi-scale approach is adopted, using both DEM and continuum techniques, to better …
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Multiscale continuum simulations of fluidization : bubbles, mixing dynamics and reactor scaling
… in complex reactor geometry, while utilizing discrete element methods to further the fundamental understanding of the hydrodynamics-chemical kinetics coupling, and develop submodels for the continuum framework applications.