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Roeplal, R.N. (author), Pang, Y. (author), Adema, Allert (author), van der Stel, Jan (author), Schott, D.L. (author)Bed permeability is a crucial factor in blast furnace efficiency and stability. The Discrete Element Method (DEM) has been used extensively to model material flow in different parts of the furnace and holds great potential for optimizing the permeability. The inherent computational load is the main bottleneck in using this method to provide...review 2023
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Yan, Y. (author), Helmons, R.L.J. (author), Carr, Michael (author), Wheeler, Craig (author), Schott, D.L. (author)A convex pattern surface has been proposed and optimized to reduce sliding wear of bulk handling equipment by adjusting the flow behaviour of bulk material. This study aims at modelling the surface deformation of the convex pattern sample to investigate how effectively the sample reduces sliding wear. Archard wear model and a deformable...journal article 2023
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Emmerink, J.V. (author), Hadi, A.H. (author), Jovanova, J. (author), Cleven, Chris (author), Schott, D.L. (author)To improve the understanding of the mixing performance of double shaft, batch-type paddle mixers, the discrete element method (DEM) in combination with a Plackett–Burman design of experiments simulation plan is used to identify factor significance on the system’s mixing performance. Effects of several factors, including three material properties...journal article 2023
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Jovanova, J. (author), van den Bos, W. (author), Schott, D.L. (author)Design of floating terminals requires integrated approach as it requires multi-machine systems. Master students in mechanical engineering from Multi-machine engineering track at TU Delft were assigned design of floating terminals as part of their Integration Project course. Each of seven student groups designed a specific piece of port...conference paper 2022
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Gilvari, H. (author), van Battum, Coen H.H. (author), Farnish, Richard (author), Pang, Y. (author), de Jong, W. (author), Schott, D.L. (author)This work investigates the proportion of generated fines in a pilot-scale experiment using a belt conveyor and commercial fuel pellets. For this, a belt conveyor with a length of 3.1 m was used and operated at varying conditions: speeds, percentages of material loading on the belt, two combinations of the inclination angle of the belt and the...journal article 2022
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Buirma, M.I.M.J. (author), Vleugel, J (author), Pruijn, J.F.J. (author), Doedee, Vincent (author), Schott, D.L. (author)The International Maritime Organisation (IMO) calls for the maritime industry to restrict its CO2 emissions by −40% (IMO2030) and −70% (IMO2050). This paper answered the following research question: “Which technical, economic and emissions-related conditions predominantly determine the feasibility of a conceptual supply chain of liquid CO2 that...journal article 2022
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Yan, Y. (author), Helmons, R.L.J. (author), Schott, D.L. (author)Sliding wear of bulk handling equipment (e.g., shovel bucket, mill and transfer chute) can be dramatically reduced by using a convex pattern surface compared to a flat surface, by adjusting the flow behavior of particles moving along the convex pattern surface. To study the effect of particle size relative to the dimensions of the convex pattern...journal article 2022
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Yan, Y. (author), Helmons, R.L.J. (author), Schott, D.L. (author)The pin-on-disc test is a standard sliding wear test used to analyse sliding properties, including wear contour and wear volume. In this study, long-term laboratory test performance is compared with a short-term numerical model. A discrete element method (DEM) approach combined with an Archard wear model and a deformable geometry technique is...journal article 2022
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Fransen, M.P. (author), Langelaar, M. (author), Schott, D.L. (author)In calibration of model parameters for discrete element method (DEM) based models the focus lies on matching the mean key performance indicator (KPI) values from laboratory experiments to those from simulation results. However, due to the stochastic nature of granular processes experimental results can show large variances. To include...journal article 2022
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Yan, Y. (author), Helmons, R.L.J. (author), Wheeler, Craig (author), Schott, D.L. (author)A previous study revealed that a convex pattern surface can reduce sliding wear of a transfer chute. A convex pattern surface is a flat surface outfitted with a pattern of convexes defined by five parameters. A three-level definitive screening design (DSD) method combined with discrete element method (DEM) is used to investigate the influence...journal article 2021
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Azevedo Vasconcelos, A.C. (author), Schott, D.L. (author), Aragon, A.M. (author), Jovanova, J. (author)This paper discusses an elastic metamaterial for filtering energy from certain frequencies of an incoming wave. The unit cell, which is composed by a single material, is built to obtain a local resonance band gap. Since Bloch-Floquet's periodic condition is enforced to the unit cell, the dynamic characteristics of the metamaterial is obtained...conference paper 2021
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- Flikkema, Maarten (author), Breuls, Martijn (author), Jak, Robbert (author), de Ruijter, Rohnen (author), Drummen, Ingo (author), Jordaens, Alexander (author), Adam, Frank (author), Czapiewska, Karina (author), Lin, Fen-Yu (author), Schott, D.L. (author), Schay, Jullius (author), Otto, William (author) report 2021
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Schiaretti, Matteo (author), Cai, Jie (author), Jiang, X. (author), Zhang, Shengming (author), Schott, D.L. (author)Industry design standards such as BS 7910 deployed some empirical formulas for the prediction of stress intensity factor (SIF) based on simulation results from traditional finite element method (FEM). However, such FEM simulation occasionally failed to convince people due to the large discrepancies compared with engineering practice. As a...journal article 2021
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van Kol, T.V. (author), Jovanova, J. (author), Mohajeri, M. (author), Schott, D.L. (author)The advances of mechatronic system design and system integration have shown improvements in functionality, performance and energy efficiency in many applications across industries, from autonomous ground vehicles and drones to conveyor belts. This trend has been adopted in some industries more than others. The design of equipment to handle...conference paper 2021
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Mohajeri, M. (author), de Kluijver, Wilbert (author), Helmons, R.L.J. (author), van Rhee, C. (author), Schott, D.L. (author)The traditional design approach of grabs and other bulk handling equipment consists of manufacturing and testing physical prototypes. A novel design approach is to use a co-simulation of MultiBody Dynamics (MBD) and Discrete Element Method (DEM), in which the virtual prototype of a new concept interacts with bulk solids. Therefore, this study...journal article 2021
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Gilvari, H. (author), van Battum, Coen H.H. (author), van Dijk, Simon A. (author), de Jong, W. (author), Schott, D.L. (author)The change in physical properties of wood pellets, with a focus on particle size distributions due to pellet breakage and attrition, was studied in a large-scale (∼450 ton/h) transportation system. Critical locations with a high probability of breakage through the whole transportation system were chosen and sampled to study the effect of...journal article 2021
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Mohajeri, M. (author), van den Bergh, Arjan J. (author), Jovanova, J. (author), Schott, D.L. (author)Ship unloader grabs are usually designed using the manufacturer's in-house knowledge based on a traditional physical prototyping approach. The grab performance depends greatly on the properties of the bulk material being handled. By considering the bulk cargo variability in the design process, the grab performance can be improved...journal article 2021
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Mohajeri, M. (author), van Rhee, C. (author), Schott, D.L. (author)This paper presents a multi-step DEM calibration procedure for cohesive solid materials, incorporating feasibility in finding a non-empty solution space and definiteness in capturing bulk responses independently of calibration targets. Our procedure follows four steps: (I) feasibility; (II) screening of DEM variables; (III) surrogate modeling...journal article 2021
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Schott, D.L. (author), Mohajeri, M. (author), Jovanova, J. (author), Lommen, S.W. (author), de Kluijver, Wilbert (author)The design of machinery for handling granular materials relies mainly on empirical methods and in-house engineering knowledge. This traditional approach provides incremental improvements that are often limited. Advancements in simulation and optimization can offer a promising alternative approach. Most of the research involved in improving or...journal article 2021
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Fransen, M.P. (author), Langelaar, M. (author), Schott, D.L. (author)Developments in discrete element modelling (DEM) enable detailed modelling of granular flows in bulk handling equipment (BHE) but due to the computational expense of DEM, wide use in analysing equipment performance is not yet feasible. Metamodels are a viable option to effectively use DEM in analysing BHE performance. Metamodels are able to...journal article 2021