CFD Modelling of HIsarna Off-gas System

HIsarna is a new and breakthrough smelting reduction technology for producing liquid hot metal for steelmaking directly from iron ores. Compared to the conventional blast furnace route, HIsarna achieves a 20% reduction in CO2 emissions by eliminating coking and the need for iron ore agglomeration processes such as sintering and pelletizing and...

Topology Optimization of Masonry Structures

Designing structures that are more sustainable is a relevant topic within the construction industry. By choosing materials that have a low embodied energy value and optimizing the structures that can be constructed by these materials, one could potentially minimize the economical and environmental footprint of a structural design.<br/><br/>As...

Towards simulating flow induced spillage in dredge cutter heads using DEM-FVM

When dredging rock using a Cutter Suction Dredger the high amount of spillage is problematic, since it prevents an energy efficient removal process. This papers presents a coupled DEM-FVM method to simulate spillage, that can be used for optimizing the design and working method of the Cutter Suction Dredger. In these simulations, the challenge...

Parametric analysis of a double shaft batch-type paddle mixer: A DEM study

The Discrete Element Method (DEM) in combination with an One Factor At a Time (OFAT) experimental simulation plan were employed to investigate the effect of a selection of factors on the mixing performance of a double shaft, batch-type paddle mixer. Most influential factors on the mixing performance of the paddle mixer are desired for...

The transition from structures to textures in magnetorheological fluids

A magnetorheological fluid is a type of smart fluid that can change its rheological properties when a magnetic field is applied to the fluid. The fluid is a suspension of magnetizable particles in a non-magnetic carrier fluid. When a magnetic field is applied to the fluid, the particles will form structures along the magnetic field lines. These...

Effects of bulk solid materials on the scraping operation of reclaim screws in a Eurosilo: An analysis using the Discrete Element Method

For years, ESI Eurosilo have successfully stored several, mostly low-density, non free-flowing bulk materials in their silo’s. Recently, demand has arisen whether bulk materials outside their current range could be stored using the same reclaim screw system. Unfortunately, the theory behind the screw dates from the 1980s and assumes fine...

Modelling Spillage in Rotating Cutter Suction Heads: A combined Finite Volume and Discrete Element Model

Due to an increased demand for transport, ships become larger, needing a larger navigable depth. For these reasons a waterway needs to be dredged and a Cutter Suction Dredger is a vessel suitable for this operation.<br/><br/>A Cutter Suction Dredger is a floating vessel which removes sand, clay or soft rock from sea or river beds. It has a...

Simulating monopile installation through scour protection using the Discrete Element Method

Over 5000 offshore wind turbine generators have been installed in the past decades. 80% of these wind turbines have a monopile foundation. Monopiles are hollow steel tubular piles with a diameter of up to 10m. The first phase of the monopile installation consists of the self-weight penetration into the seabed due to the mass of the monopile....

A Topology Optimization Process for Discrete Modular Design based on Discrete Element Modelling for generating reconfigurable funicular structures

Assessing the drivability of a monopile through the rock armour layer: An analysis using Discrete Element Method and small-scale testing

Deployment of renewable energy is essential to reach a carbon neutral economy. Offshore wind farms have caught the interest of many developed countries since they are an essential source of green energy. The interest of this thesis lays in the design of the foundation used for offshore wind farms, in particular the interaction between the...

CFD-DEM Coupling for Systems of Fluid and Non-Spherical Particles

The models for CFD-DEM coupling for fluid-particles simulations are explored. Emphasis is given to the implementation of a multisphere approach to handle non-spherical particles and to improvements of current features available in software packages. Some tests and applications are proposed.

Study of Rheological Behaviour of Spherocylindrical Particle Suspension via CFD-DEM: Formulation of Stress-Closure for Industrial Fluidized Bed Simulation

While colloidal suspensions of non-spherical particles have been studied relatively extensively, granular suspensions of non-spherical particles are rarely studied. The rheological behaviour of elongated granular particles is therefore not well known. This thesis deals with suspensions of rod-like particles of aspect ratio 4 subjected to shear...

Numerical investigation on the bimodal structure of particle packings for a widely graded soil: (Abstract)

A discrete numerical model of the front region in piping erosion: (Abstract)

Improving the chute design for Eurosilo system

The transfer chute design for Eurosilo system handling coal was found to fail due to wear. The current transfer chute was designed based on rockbox concept. There are no specific methodologies for design of chutes for a rock box concept involving a very high velocity transfer. New or improved designs were required to sustain in the industry. The...

On the durability tests for handling of solid biomass such as wood pellets