Searched for: subject:"permeability"
(1 - 20 of 177)

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Kaptein, Milou (author)
The control of infiltration and seepage of water is one ofthe most challenging tasks in water management and civil­-engineering and, inan attempt to control this, methods for forming a water­impermeable layer inthe soil have been widely practised in soil engineering (Laumann et al., 2018;Proto et al., 2016). The use of...
master thesis 2021
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Gerritsma, Isabel (author)
Degrading mangrove forests and coinciding erosive coastlines is an urgent global concern. Mangroves are essential for their interaction with hydrodynamic and sediment processes at mangrove-mud coasts. Earlier on, solutions were sought in building ’hard’ structures, such as concrete sea walls, to lower incoming wave energy and enhance...
master thesis 2020
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Khan, Y. (author)
An experimental study is conducted on the design of actively controlled semi-permeable inserts for mitigating turbulent boundary layer noise originating from the trailing edge of an airfoil. Two sets of perforated inserts with hole diameter: 0.8 mm and hole spacing: 1.5 mm & 3 mm, are considered. The inserts are 3-D printed with a middle...
master thesis 2020
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Grofelnik, L. (author)
Skopje has developed through a series of erasures and periods of rebuilding, each time with an aim to establish a new order. Conversely, the common culture can be best recognized in self organized commercial spaces in the city, which emerge from activities taking place and forming the physical. The city centre is fragmented in pieces of imposed...
master thesis 2020
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Versluis, Barry (author)
Many laboratory tests of samples where the rock fractures are based on<br/>meso-scale (cm) characterization of effective ‘intact’ strength parameters neglecting the microstructure effects. Understanding fracturing processes at<br/>micro-scale (mm) will require models with microstructure data. However,<br/>data is lacking on micro-scale.<br/...
bachelor thesis 2020
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Zhou, Jianchao (author)
Stability of dikes is a national security issue for densely populated low-lying countries situated in delta areas, like the Netherlands. One of the dominant dike failuremechanisms in the Netherlands is piping, where high seepage flow rates transport sand particles and subsequently form a ’pipe’ under a dike structure. As such, one manner to...
doctoral thesis 2020
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Zhu, Zichong (author), Huang, Yunkai (author), Dong, J. (author), Peng, Fei (author), Yao, Yu (author)
This article presents a new rotor design to reduce rotor eddy current loss of a high-speed permanent magnet synchronous machine for flywheel energy storage system. Instead of using common nonmagnetic sleeves, the new rotor incorporates permeable retaining sleeves (PRSs) to fix permanent magnets on the rotor hub. The PRSs are made of permalloy...
journal article 2020
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Gavel, D.J. (author)
The principal objective of this work is to understand the physicochemical behaviour of the ferrous raw material (pellet and/or sinter) bed mixed with nut coke under the blast furnace conditions. To investigate this behaviour, a specially designed blast furnace simulator called the Reduction Softening and Melting (RSM) apparatus is utilised ...
doctoral thesis 2020
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Khern, Yih Chen (author), Paul, Suvash Chandra (author), Kong, Sih Ying (author), Babafemi, Adewumi John (author), Anggraini, Vivi (author), Miah, Md Jihad (author), Šavija, B. (author)
Studies have shown that the incorporation of waste tire rubber aggregates reduces the strength, increases permeability and decrease thermal conductivity of concrete. However, only a few studies have investigated the effect of surface-modified rubber aggregates on the properties of concrete. This study investigates the effect of the surface...
journal article 2020
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van der Horst, M.P. (author), Kaminski, M.L. (author)
The metal magnetic memory method is a novel technique for monitoring fatigue cracks in steel structures, which can reduce operational expenses and increase safety by minimizing inspections. The crack geometry can be identified by measuring the self magnetic flux leakage, which is induced by the Earth’s magnetic field and the permanent...
journal article 2020
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van Verseveld, C.J.W. (author), Gebert, J. (author)
Effective gas permeability is an important parameter in the design of methane oxidation systems, governing diffusive oxygen ingress and the spatial spread of landfill gas. The influences of soil texture, compaction, soil moisture and the resulting air filled porosity on the gas permeability were researched by performing pressure loss...
journal article 2020
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Gavel, D.J. (author), Adema, A.T. (author), van der Stel, Jan (author), Sietsma, J. (author), Boom, R. (author), Yang, Y. (author)
Effect of nut coke addition with ferrous burden (pellet and sinter mixture) is experimentally investigated under simulated blast furnace conditions. Nut coke mixing degree was varied (0, 20 and 40 wt-%) as a replacement of the regular coke. During smelting, the ferrous bed evolves through three distinct stages of shrinkage due to indirect...
journal article 2020
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Stroeven, P. (author), Słowik, M. (author)
Cauchy paved the way for constructing models in concrete technology, and elsewhere. He determined the (non-flat) surface area in 3D by measuring random total projections. Analogously, he determined the length of a curved line in 2D by way of measuring the total projections. The paper will present the mathematical expressions, because in many...
journal article 2020
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Aguilar Lopez, J.P. (author), Bogaard, T.A. (author), Gerke, Horst H. (author)
Dual-permeability models assume that the complete porous media system can be represented by two different interacting subsystems: the matrix and the fracture pore domain. For some soils like fractured clays, the fracture domain may be empty, which makes its physical behavior differ significantly from capillary flow. Our main hypothesis is...
journal article 2020
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Kluge, C. (author), Blöcher, Guido (author), Barnhoorn, A. (author), Bruhn, D.F. (author)
Fault zones are key features in crystalline geothermal reservoirs or in other subsurface environments due to the fact that they act as main fluid pathways. An adequate experimental description of the evolution of permeability of a realistic microscopic fault zone under in-situ reservoir and fracture parallel flow conditions is required. To...
journal article 2020
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Gavel, D.J. (author), Adema, Allert (author), van der Stel, Jan (author), Peeters, Tim (author), Sietsma, J. (author), Boom, R. (author), Yang, Y. (author)
Physicochemical behaviour of the pellets, sinters and its mixture (60% pellets: 40% sinter) is investigated by a series of smelting and quenching experiments. For all ferrous raw-material beds, three distinct stages of bed shrinkage occur due to indirect reduction, softening and melting. However, the characteristic nature (displacement,...
journal article 2020
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Winterwerp, J.C. (author), Albers, Thorsten (author), Anthony, Edward J. (author), Friess, Daniel A. (author), Gijón Mancheño, A. (author), Moseley, Kene (author), Muhari, Abdul (author), Tas, S.A.J. (author), Tonneijck, Femke H. (author)
Mangrove-mud coasts across the world erode because of uninformed management, conversion of mangrove forests into aquaculture ponds, development of infrastructure and urbanization, and/or extraction of groundwater inducing land subsidence. The accompanied loss of ecosystem values, amongst which safety against flooding, has far reaching...
journal article 2020
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Tang, Shiyu (author)
The ceramic Nanofiltration membranes are studied in TU Delft to treat the brine. It has abilities to concentrate NOM and separate it from salts, and chemical precipitation to recover a clean solution with regeneration salt (i.e., NaCl) from the membrane permeate.For achieving this, the first step should build up the Setup. Therefore, this...
student report 2019
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Jansen, Wiljan (author)
Mangrove forests, which serve as a natural sea defence, have been degraded by human action during the last decades. To protect and recover these areas, different types of permeable structures consisting of bamboo have been proposed and applied. However, these structures are currently based on engineering judgement, as design rules are not...
master thesis 2019
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van Grieken, Jesper (author)
In this thesis, a general method to predict the notional permeability for various structure lay-outs is developed. A numerical model is used to find a characteristic value for different structure lay-outs: the three structures for which Van der Meer determined the P-value, and a fourth structure of which the P-value has to be predicted. The P...
master thesis 2019
Searched for: subject:"permeability"
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