Searched for: subject:"DEM"
(1 - 20 of 37)

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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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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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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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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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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), Nijssen, Tim M.J. (author), Kuipers, J. (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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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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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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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
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Wang, Guijie (author), Heidari, A. (author), Makinwa, K.A.A. (author), Meijer, G.C.M. (author)
This paper describes the design of a precision bipolar junction transistor based temperature sensor implemented in standard 0.7-μmCMOS technology. It employs substrate p-n-ps as sensing elements,which makes it insensitive<br/>to the effects of mechanical (packaging) stress and facilitates the use of low-cost packaging technologies. The sensor...
journal article 2017
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Zhou, C. (author), Liu, X. (author), Apostolidis, P. (author)
Low Temperature Asphalt (LTA) technologies are utilized in asphalt pavement industry to lower energy demands and greenhouse gas emission during mixing and construction processes. Although these technologies are currently available and hope to demonstrate similar performance with Hot Mix Asphalt (HMA) mixes, LTA shows more sensitive than HMA to...
conference paper 2017
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Phan Hien, V. (author), Lindenbergh, R.C. (author), Menenti, M. (author)
Monitoring glacier changes is essential for estimating the water mass balance of the Tibetan Plateau. In this study, we exploit ICESat laser altimetry data in combination with the SRTM DEM and the GLIMS glacier mask to estimate trends in change in glacial thickness between 2003 and 2009 on the whole Tibetan Plateau. Considering acquisition...
journal article 2017
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Lommen, S.W. (author)
This dissertation has investigated whether a combination of DEM and MBD can be used for a reliable and accurate environment for predicting grab unloading performance. A grab is a type of bulk material handling equipment used for unloading materials such as coal and iron ore from vessel to shore. Both a grab and iron ore pellets have been...
doctoral thesis 2016
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Derakhshani, S.M. (author)
Dust has negative effects on the environmental conditions, human health as well as industrial equipment and processes. In this thesis, the transfer point of a belt conveyor as a bulk material handling system with a very high potential place for dust liberation is studied. This study is conducted based on experimental and numerical methods as...
doctoral thesis 2016
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Graniczny, M. (author), Cyziene, J. (author), van Leijen, F.J. (author), Minkevicius, W. (author), Mikulenas, V. (author), Satkunas, J. (author), Przylucka, M. (author), Kowalski, Z. (author), Uscinowicz, S. (author), Jeglinski, W. (author), Hanssen, R.F. (author)
The article contains results obtained from realization of the Polish and Lithuanian Baltic case study within the EU – FP 7 SubCoast project, which one of the primary aims was analysis of vertical ground movements, potentially causing geohazards in the coastal areas. To reach this goal Interferometric Synthetic Aperture Radar (InSAR) data were...
journal article 2015
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Le, N.L.B. (author), Stroeven, P. (author), Stroeven, M. (author), Sluys, L.J. (author)
Details of a complete methodology for porosimetry of virtual concrete have been described in a series of publications. This paper shortly sketches the main characteristics, whereupon it is indicated how a pore network model is designed based on data extracted from the virtual cement paste. This involves smoothing the main trunks as the main pore...
conference paper 2015
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Li, K. (author), Stroeven, P. (author), Stroeven, M. (author), Sluys, L.J. (author)
Permeability of virtual cement seems to exceed experimental data by several orders of magnitude. The differences may actually not be that dramatic, since experimental samples are in practice not always fully saturated as generally assumed. This paper demonstrates that this has enormous effects on permeability. A numerical study is conducted on...
conference paper 2015
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Li, K. (author), Stroeven, P. (author), Le, L.B.N. (author)
A novel methodology is described for porosimetry as well as for water transport through the pore system in dynamic DEM-based virtual cementitious materials. The pore network topology, the pore size distribution and the pore connectivity are assessed on the basis of a robotics-inspired pore delineation method and star volume measurements....
journal article 2015
Searched for: subject:"DEM"
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