Searched for: subject%3A%22permeability%22
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Luesutthiviboon, S. (author)
Nowadays, large wind turbines are installed and operated close to densely populated areas due to the growing need for renewable energy. Noise constraints are hampering this development. The most relevant wind turbine noise source is the so-called Turbulent Boundary Layer Trailing-Edge (TBL–TE) noise. Many passive TBL–TE noise reduction...
doctoral thesis 2022
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Rego, Leandro (author)
Aircraft noise levels have been significantly reducedwith the introduction of high-bypass ratio turbofan engines, particularly jet noise due to turbulence mixing. This, however, has led to engines with larger diameters and a closer coupling between them and the airframe. As a result, interactions between the exhaust jet flow and the wing give...
doctoral thesis 2022
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Gravenberch, Jip (author)
Vegetated permeable pavement systems (VPPS) contribute to a more climate-resilient application of urban water management. However, a complete hydrologic evaluation of vegetated permeable pavement systems has not been found in existing literature. This research presents an evaluation of the hydrologic performance of VPPS under Dutch climatic...
master thesis 2022
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Alferink, Marijn (author)
The coastline of Demak, Indonesia has been eroded during the last 15 years. To restore the natural coastal protection which existed out of mangroves forest, permeable dams, consisting of bamboo poles with a brushwood filling, have been built to attenuate the waves and facilitate sedimentation behind the dams and thus creating a habitat for...
master thesis 2022
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Bai, Ying (author), Wang, Zongzhi (author), van der Hoek, J.P. (author)
Agricultural activities can be important source of organic pollution. In agricultural intensive areas, organic chemicals have a high possibility of entering the water cycle, which could pose a potential risk to human health. Low-cost and high efficiency in-situ techniques instead of energy and money consuming ones to control agricultural organic...
review 2022
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Yang, Zhengxian (author), Shi, Peng (author), Zhang, Yong (author), Li, Z. (author)
Internal curing by superabsorbent polymer (SAP) has been applied in alkali-activated slag (AAS) systems by a few previous studies with the purpose to mitigate the autogenous shrinkage. However, the effects of SAP on other properties of AAS have been rarely studied. In this paper, the workability, strength, permeability, and frost resistance...
journal article 2022
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Wang, L. (author), Golfier, Fabrice (author), Tinet, Anne-Julie (author), Chen, Weizhong (author), Vuik, Cornelis (author)
This work investigates numerical method and equivalent continuum approach (ECA) of fluid flow in fractured porous media. The commonly used discrete fracture model (DFM) without upscaling needs full discretization of all fractures. It enjoys the merit of capturing each fracture accurately but will get in trouble with mesh partition and low...
journal article 2022
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Lesueur, M.J.B.P. (author), Rattez, Hadrien (author), Colomes, Oriol (author)
Flow simulations on porous media, reconstructed from Micro-Computerised Tomography (μCT) scans, is becoming a common tool to compute the permeability of rocks. Still, some conditions need to be met to obtain accurate results. Only if the sample size is equal or larger than the Representative Elementary Volume will the computed effective...
journal article 2022
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Çağlar, B. (author), Broggi, Guillaume (author), Ali, Muhammad A. (author), Orgéas, Laurent (author), Michaud, Véronique (author)
Permeability of fibrous microstructures is a key material property for predicting the mold fill times and resin flow path during composite manufacturing. In this work, we report an efficient approach to predict the permeability of 3D microstructures from deep learning based permeability predictions of 2D cross-sections combined via a circuit...
journal article 2022
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Batt, Till (author), Herwig, Gordon (author), Annaheim, Simon (author), Clement, Pietro (author), Furer, Lea (author), Hirsch, Cordula (author), Varanges, Vincent (author), Çağlar, B. (author), Michaud, Véronique (author)
The COVID-19 pandemic resulted in shortages of personal protective equipment and medical devices in the initial phase. Agile small and medium-sized enterprises from regional textile industries reacted quickly. They delivered alternative products such as textile-based community masks in collaboration with industrial partners and research...
journal article 2022
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Shahzad, H. (author), Hickel, S. (author), Modesti, D. (author)
We perform direct numerical simulations of turbulent flow at friction Reynolds number Re<sub>τ</sub>≈ 500 - 2000 grazing over perforates plates with moderate viscous-scaled orifice diameter d<sup>+</sup>≈ 40 - 160 and analyse the relation between permeability and added drag. Unlike previous studies of turbulent flows over permeable surfaces,...
journal article 2022
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Zaaijer, Floris (author)
Mechanical air entrapment, void compression and void dissolution are the main mechanisms behind void formation in liquid composite molding. Mechanical air entrapment is induced by the highly non-uniform geometry at the meso- and micro-scale and the heterogeneous properties of the reinforcing material. This results in differences in the velocity...
master thesis 2021
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Hartog, Friso (author)
Turbulent drag is the largest source of fuel consumption in aviation and forms a significant contribution to climate warming. Recent numerical studies have suggested the ability of surfaces with streamwise-preferential permeability to reduce turbulent friction, and a theoretical framework behind the working mechanism has been proposed. This work...
master thesis 2021
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Kiers, Denise (author)
There is a growing urbanization trend in Amsterdam, this causes dwellings to be less affordable. That is why several areas in Amsterdam are being densified. One of these areas is Sloterdijk Centrum, a typical monofunctional office park of the 80’s and 90’s. The municipality wants to transform this park to a lively mixed use area by adding new...
master thesis 2021
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Kozicka, Aleksandra (author)
The presented project concerns the design concept and process, as well as the preceding methodologies for the development of an architectural intervention in the Rotterdam South. Main notion of the project is the idea of permanent transition in the architectural and urbanistic realms. The concept of migration is used as the starting point for...
master thesis 2021
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Andrade, C. (author), Coppens, E. (author)
In Belgium the construction of a repository for low and intermediate short living radioactive waste is in preparation. The safety is, among other aspects, based on engineered barriers of cementitious materials preventing release of radionuclides to the atmosphere or to the surrounding soil. Relatively low water infiltration through these...
conference paper 2021
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Nguyen, Thi Nhan (author), Phung, Quoc Tri (author), Frederickx, Lander (author), Jacques, Diederik (author), Dauzeres, Alexandre (author), Elsen, Jan (author), Pontikes, Yiannis (author)
This work investigates the water permeability of alkali-activated materials (AAMs), which is one of the key transport properties beside the diffusivity to assess the material durability. The AAMs were produced from granulate blast furnaces slag (BFS) and metakaolin (MK) with various water/binder ratios of 0.35, 0.45, 0.55, and 0.75, 0.85, 0.95...
conference paper 2021
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Paglia, C. (author), Antonietti, S. (author)
In reinforced concrete structures carbonation and chloride ingress are two main phenomena that induce rebar corrosion. Agents such as CO2 gas or water containing chloride enter the cementitious material mainly throughout the pore system. The air permeability was measured with a non-destructive rapid test method. The aim of the present work was...
conference paper 2021
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Zuo, Chenjia (author), Zhang, Yixiang (author), Tong, Yudong (author), Liu, Yanbo (author)
Synthetic fibers have been widely studied as reinforcing materials to increase the mechanical and durability properties of concrete. According to its diameter, fibers can be categorized as micro and macro (or coarse) fibers. As most research focuses on the mechanical properties of fiber reinforced concrete, its chloride permeability properties...
conference paper 2021
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Kluge, C. (author)
The Earth’s subsurface exhibits a high potential for generating and storing energy. Engineered fractured systems, for example geothermal or carbon storage reservoirs, highly depend on the capacity of rock to conduct and store fluids. Faults and fractures create the largest contrasts in flow in these reservoirs and can enhance the reservoir...
doctoral thesis 2021
Searched for: subject%3A%22permeability%22
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