Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"CFD--DEM"”.
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A methodology for coupled CFD-DEM modeling of particulate suspension rheology
… were used, namely Computational Fluid Dynamics (CFD) and the Discrete Element Method (DEM). CFD uses a continuum approach to model the fluid component, while DEM resolves the behaviour of each individual particle. Two separate software programmes were used. For CFD, Open FOAM® was chosen, and for …
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Study of micro-sized particle deposition using DEM, CFD-DEM and SPH approach
… Part one of the thesis is concerned with DEM simulation of micro-sized cohesive granular particles using two history dependent contact models. The simulation results are presented using porosity, coordination number, RDF and force distribution. It was observed that the particles with …
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CFD – DEM Modeling and Parallel Implementation of Three Dimensional Non- Spherical Particulate Systems
… this research, a novel Discrete Element Method (DEM) model that incorporates geometry definition, collision detection, and post-collision kinematics has been developed to accurately simulate non-spherical particulate systems. Superellipsoids, which account for 80% of particles commonly found in …
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CFD-DEM MODELLING OF PARTICLE-GAS REACTIVE FLOWS AND ITS APPLICATION IN BLAST FURNACE REGIONS
… fluid dynamics-discrete element method (rCFD-DEM) featuring two state-of-the-art techniques - coarse-grained method and smoothing method is developed to describe raceway dynamics and coke combustion in a three-dimensional (3D) industrial-scale BF. The typical phenomena are illustrated in …
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Methods Development and Validation for Large Scale Simulations of Dense Particulate Flow systems in CFD-DEM Framework
… Dynamics Coupled to Discrete Element Method (CFD-DEM) is widely used in simulating a large variety of particulate flow system. This Eulerian-Lagrangian technique tracks all the particles included in the system by the application of point mass models in their equation of motion. CFD-DEM is a …
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CFD-DEM modelling of liquid-solid-gas flow in rotary drums and an application in solar panel leaching
… fluid dynamics-discrete element method (CFD-DEM) coupled with the volume of fluid (VOF) to describe the complex behaviours of liquid-nonspherical-particle-gas flow. Then, it is particularly applied to the application of the silver leaching process in a rotary drum - a crucial step in the …
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Production and activation of shear-responsive drug carriers for treating obstructed blood vessels: a coupled CFD-DEM approach
L'abstract è presente nell'allegato / the abstract is in the attachment
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Computational Fluid Dynamics Modeling and Simulations of Fluidized Bed Reactors for Chemical Looping Combustion
… of experimental studies on CLC in recent years, CFD simulations have been limited in the literature.</p><p>In this dissertation, reacting flow simulations of a CLC reactor are developed using the Eulerian approach based on a laboratory-scale experiment of a dual fluidized bed CLC system. The …
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Microscale Investigation of the Influence of Interparticle Cohesion on the Macro-Behaviour of Soil
… methods such as discrete element method (DEM), cohesive interactions between soil particles are often neglected and simplified. This thesis aims to address this critical gap by considering the cohesive behaviour in DEM and CFD-DEM simulations and investigating the influence of …
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PERFORMANCE ANALYSIS AND THE EFFECTS OF KEY PARAMETERS IN SOLID PARTICLE BEDS
… u_mf for this type of fluidized bed. Our CFD-DEM simulations showed that there is an increase in recirculation zones for increasing bed thickness to particle ratio. An approach to quantifying the effectiveness of solid particle beds has been proposed with heat transfer between fluid and …
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Multi-scale modeling of the hydrodynamics, sediment transport, and morphodynamics in the nearshore
… to different wave events has always been demanding in coastal zones. Here, a multi-scale modeling approach was taken to study the hydrodynamics and the underlying sediment transport and morphodynamics for a variety of bed sediment configurations under different wave conditions. First, …
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The Application Of Polymer Particles In Industrial Processes
… best practice in such industries. In terms of academic research, the knowledge created in this thesis provides the basis for the application of CFD-DEM modelling to understand complex multi-phase and multi-component systems. In particular, the thesis advocates the application of the Free Surface …
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Deep Learning Methods for Predicting Fluid Forces in Dense Particle Suspensions
… TFM (Two fluid model), the meso-scale CFD-DEM (CFD - Discrete Element Method) and the micro-scale PRS (Particle Resolved Simulation method). As the simulation scale decreases, accuracy increases but with an exponential increase in computational time. Since fluid forces have a large …
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Applications of Data-Driven Learning Models in Fluid Mechanics: Solid-Fluid Multiphase Systems and Bat Flight
… in dense suspensions. Meso-scale models such as CFD-DEM often rely on empirical drag correlations that neglect microscale particle-particle interactions, leading to inaccuracies. To bridge this gap, we develop deep learning models—including convolutional neural networks (CNNs) and graph neural …
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A Computational Framework for Fluid-Thermal Coupling of Particle Deposits
… previously. The coupling is done by using a CFD-DEM framework in which a physics based collision model is used to predict the post-collision state-of-the-sand-particle. The collision model is sensitive to temperature dependent material properties of sand. Particle deposition is determined by …
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Particle-Resolving Simulations of Dune Migration: Novel Algorithms and Physical Insights
… solvers OpenFOAM and LAMMPS. OpenFOAM is a CFD toolbox that can perform three-dimensional flow simulations on unstructured mesh; LAMMPS is a massively parallel DEM solver for molecular dynamics. To enable the particle-resolving simulation of sediment transport on an arbitrary mesh, a …