Searched for: subject%3A%22DEM%22
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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
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Helmons, R.L.J. (author)
conference paper 2015
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Adema, A.T. (author)
doctoral thesis 2014
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Hoornahad, H. (author), Koenders, E.A.B. (author)
Since the early 20th century, the necessity of modeling and monitoring fresh concrete behavior has been recognized by the industry with the objective to ensure adequate mechanical properties and a proper durability of concrete structures. Due to the rapid development of computer technology, the applications of computational simulation tools in...
conference paper 2013
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Stroeven, P. (author), Le, L.B.N. (author)
Porosimetry of matured cementitious materials is of hiigh interest, because durability is governed by the capillary pore network structure. Experimental approaches are time-consuming, laborious and thus expensive. Fast developments in computer technology make it nowadays possible quite realistically producing cementitious materials in virtual...
conference paper 2013
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Stroeven, P. (author), He, H. (author)
Loose random and dense random mono-size pacl<ing states were investigated by the discrete element modelling (DEM) for eight types of polyhedral grains, for ellipses with different aspect ratio, for cubes and for spheres. Focus was on density, sphericity of the grains and average value and frequency distribution of coordination number. The 3D...
conference paper 2013
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Miedema, S.A. (author)
conference paper 2013
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Derakhshani, S.M. (author)
conference paper 2013
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Stroeven, P. (author), He, H. (author), Le, L.B.N. (author)
Realistic simulation of particulate materials like concrete on meso- as well as micro-level is nowadays possible by fast developments in computer technology. This would be a more economic way than by physical experiinents, which are more time-consuming, laborious and thus expensive. This concern the production of the aggregate structure or of...
conference paper 2012
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Meijer, L.J.J. (author)
A continuous population growth and increasing energy demand combined with depleting traditional energy reserves puts a pressure on conventional methods of electricity generation. The desire and ambition to create a more sustainable society paves the way for the ‘renewables’. Hydropower or Hydroelectricity already plays a significant role in...
master thesis 2012
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Huan He, H. (author), Le, N.L.B. (author), Stroeven, P. (author)
Durability of concrete in engineering structures is becoming more and more of a major problem. Research into such problems is complicated and expensive, however. Developments in computer technology make it possible nowadays realistically simulating cementitious materials and studying its pore network structure. In this paper use is made of the...
journal article 2012
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Stroeven, P. (author), Le, N.L.B. (author), Stroeven, M. (author), Sluys, L.J. (author)
The paper introduces a novel approach to porosimetry in virtual concrete, denoted as random node structuring (RNS). The fresh state of this particulate material is produced by the DEM system HADES. Hydration simulation is a hybrid approach making use of wellknown discretization and vector methods. Particle interferences (overlap) in the dynamic...
conference paper 2011
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Bitenc, M. (author), Lindenbergh, R.C. (author), Khoshelham, K. (author), Van Waarden, A.P. (author)
The Dutch coast is characterized by sandy beaches flanked by dunes. Understanding the morphology of the coast is essential for defense against flooding of the hinterland. Because most dramatic changes of the beach and the first dune row happen during storms, it is important to assess the state of the coast immediately after a storm. This is...
journal article 2011
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Ghawana, T. (author), Zlatanova, S. (author)
GIS is changing rapidly its face with the advancement of computing technologies. From merely a 2D representation of real world features, it is moving to present more and more applications in 3D formats. Today 3D GIS is an essential way of handling the spatial data in urban planning. In cities where every inch of land is measured and is consumed...
journal article 2010
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Yu, H. (author)
Glacier melting has become a key issue in the current discussion on global climate change. Glaciers of the Tibetan Plateau may be heavily affected by global warming. Hence, possible glacier melting over the plateau attracts the most attention. Possible glacier melting is evaluated via studies on mass balance of the glaciers. Glacier elevation...
master thesis 2010
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Bitenc, M. (author), Lindenbergh, R.C. (author), Khoshelham, K. (author), Van Waarden, A.P. (author)
The Dutch coast is characterized by sandy beaches flanked by dunes. Its morphology is essential for the defense against flooding of the hinterland. Therefore it is monitored on a yearly basis by Airborne Laser Scanning (ALS). However, it is recognized that most erosion of the beach and first dune row takes place during storms. To assess the...
conference paper 2010
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He, H. (author)
Physical particle packing is becoming a hot topic in concrete technology as more and more types of granular materials are used in concrete either for ecological or for engineering purposes. Although various analytical methods have been developed for optimum mixture design, comprehensive information on particle packing properties is still missing...
doctoral thesis 2010
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Miedema, S.A. (author)
conference paper 2010
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Parasie, N. (author)
Seafloor Massive Sulfide (SMS) contains high levels of metals such as copper and gold. Water depths of 2000 up to 3000 meter make mining of SMS a challenge. Despite this, mining industry encourages research into feasible extraction methods of SMS, pushed by the high metal prices nowadays. This research focuses on the influence of hydrostatic...
master thesis 2009
Searched for: subject%3A%22DEM%22
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