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Rottink, Martine (author)Around the world, there are 58 Small Island Developing States (SIDS). What these SIDS generally have in common is that they are very susceptible to different natural hazards, among which coastal flooding. In order to address this issue, adaptation measures are needed. In order to prioritize adaptation efforts when considering these islands at a...master thesis 2019
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van den Bergh, Arjan (author)Grabs are often used for unloading bulk carriers that transport iron ore cargoes around the globe. The unloading process is time-consuming, and terminals strive to maximise their turnover capacity. Grab performance is a combination of maximum crane capacity, grab design and bulk material behaviour. Due to bulk uncertainties occurred by varying...master thesis 2019
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Grashof, Bernd (author)Rock cutting is a challenging process. Heavy equipment, large cutting forces, high wear rates and large amounts of required energy are common challenges when cutting rock. Traditionally, rock cutting is based on a linear motion of the cutting tool. However, a significant improvement on the cutting performance is expected when using non-linear...master thesis 2019
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Mema, I. (author), Mahajan, V.V. (author), Fitzgerald, B. (author), Padding, J.T. (author)The aim of many industrial processes is to manipulate solid particle aggregates within gas suspensions. Prime examples of such processes include fluidised bed reactors, cyclone separators, and dust collectors. In recent years, fluidised bed reactors have been used in the gasification of biomass particles. When fluidised, these particles are...journal article 2019
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Grashof, Bernd (author), Alvarez Grima, M. (author), Schott, D.L. (author), Helmons, R.L.J. (author)Rock cutting is a challenging process. Heavy equipment, large cutting forces, high wear rates and large amounts of required energy are common challenges when cutting rock. Traditionally, rock cutting is based on a linear motion of the cutting tool. However, a significant improvement on the cutting performance is expected when using non-linear...conference paper 2019
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Yan, Y. (author), Vreeburg, Wouter (author), Chen, Guangming (author), Schott, D.L. (author)Using bionic surface on the material equipment interface of bulk handling equipment is a promising solution for wear reduction. A bionic surface is a flat surface outfitted with a pattern of convexes that disrupt the natural sliding flow of bulk material. Previous numerical work has shown a significant reduction of wear of bionic surfaces...conference paper 2019
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Gilvari, H. (author), de Jong, W. (author), Schott, D.L. (author)The breakage behaviour of biomass pellets with a diameter of 6 mm under uniaxial compression test was studied experimentally and numerically using the discrete element method (DEM). Two types of the available bonding contact models in EDEM software were used to compare the macroscopic properties including the maximum stress at failure, strain at...conference paper 2019
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Winsemius, H.C. (author), Ward, Philip J. (author), Gayton, Ivan (author), ten Veldhuis, Marie-claire (author), Meijer, D.H. (author), Iliffe, Mark (author)A Commentary on 'The Need for a High-Accuracy, Open-Access Global DEM' by Schumann, G. J.-P., and Bates, P. D. (2018). Front. Earth Sci. 6:225. doi: 10.3389/feart.2018.00225journal article 2019
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Fitzgerald, B. (author), Zarghami, A. (author), Mahajan, V.V. (author), Pacha Sanjeevi, S.K. (author), Mema, I. (author), Vikrant, V. (author), El Hasadi, Yousef M.F. (author), Padding, J.T. (author)In this paper, we present a number of key numerical methods that can be used to study elongated particles in fluid flows, with a specific emphasis on fluidised beds. Fluidised beds are frequently used for the production of biofuels, bioenergy, and other products from biomass particles, which often have an approximate elongated shape. This...journal article 2019
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Xiong, T. (author), Xinzhuo, Zhang (author), Miedema, S.A. (author), Chen, X. (author)Slurry transport is a very important means of transporting solids through a pipeline. To improve the efficiency of slurry transport, especially in coarse particle transport, which is subject to problems such as strong resistance and easy blockage, more of the internal structure of the flow must be known. Empirical and analytical models are...journal article 2019
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Mahajan, V.V. (author), Mehmood, J. (author), El Hasadi, Yousef M.F. (author), Padding, J.T. (author)The rheology of suspensions of high-inertia (or granular) non-spherical particles characterized by high particle Stokes and Reynolds numbers is rarely investigated. In this study, we investigate the rheology of suspensions of inertial rod-like particles of aspect ratio 4 subjected to shear flow. In particular, the effect of fluid medium (air,...journal article 2019
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Wijnands, Jasper (author)Manganese nodules have been lying on the deep sea soil for centuries before they became known. The first ones to discover the nodules were Murray and Renard, during their scientific cruise between 1872 and 1876 (Murray and Renard, 1876). The Clarion-Clipperton Zone, located between Mexico and Hawaii, appears to have a virtually inexhaustible...master thesis 2018
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Karaca, Kadir (author)Bulk handling grabs wear due to interaction with bulk material. In this research the geometrical shape of the grab is adjusted to reduce this wear. A DEM simulation using an iron ore pellet material model, created by S. Lommen, is used to assess different concepts. The material model is validated for forces, but not for wear. Wear measurements...master thesis 2018
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Fantin, Davide (author)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.master thesis 2018
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Mehmood, Junaid (author)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...master thesis 2018
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Mahajan, V.V. (author), Nijssen, Tim M.J. (author), Kuipers, J.R. (author), Padding, J.T. (author)Fluidised beds are used in a variety of processes because of their favourable mass and heat transfer characteristics. In this and many other processes, non-spherical particles are commonplace, which can drastically affect the fluidisation behaviour. In this study, we use numerical models to study non-spherical fluidisation behaviour in detail...journal article 2018
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Lommen, S.W. (author), Lodewijks, G. (author), Schott, D.L. (author)Purpose: Bulk material-handling equipment development can be accelerated and is less expensive when testing of virtual prototypes can be adopted. However, often the complexity of the interaction between particulate material and handling equipment cannot be handled by a single computational solver. This paper aims to establish a framework for...journal article 2018
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Liu, H. (author)Digital elevation models (DEM) are widely used in various distributed hydrological models. The stream network can be extracted from it so that runoff routing can be calculated. With the advent of remote sensing and computing technologies, the computation based on DEM with high resolution becomes possible. However, there still exist regions with...conference paper 2018
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- Scheuermann, A. (author), Harshani, H.M.D. (author), Galindo-Torres, S. (author), Aminpour, M. (author), Bittner, T. (author), Li, L. (author) conference paper 2017
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Helmons, R.L.J. (author)As a result of the worldwide population and welfare growth, the demand for energy (oil, gas and renewable sources) and raw materials increases. In the last decades, oil and gas are produced from more and more offshore sites and deeper waters. Besides energy, the demand for diverse metals and rare earth elements increases as well. These raw...doctoral thesis 2017