Searched for: subject%3A%22piping%22
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Pol, J.C. (author), Kanning, W. (author), van Beek, Vera M. (author), Robbins, Bryant A. (author), Jonkman, Sebastiaan N. (author)
Backward erosion piping (BEP) is a form of internal erosion which can lead to failure of levees and dams. Most research focused on the critical head difference at which piping failure occurs. Two aspects have received less attention, namely (1) the temporal evolution of piping and (2) the local hydraulic conditions in the pipe and at the pipe...
journal article 2022
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Lovato, S. (author), Keetels, G.H. (author), Toxopeus, S. L. (author), Settels, J. W. (author)
This article presents a new turbulence closure based on the k-ω SST model for predicting turbulent flows of Herschel–Bulkley fluids, including Bingham and power-law fluids. The model has been calibrated with direct numerical simulations (DNS) data for fully-developed pipe flow of shear-thinning and viscoplastic fluids. The new model shows...
journal article 2022
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Dekker, Levi (author)
In this thesis, a ground structure based thermofluid topology optimization (TO) method is presented which is applicable to problems with creeping flow. Fluid channels with creeping flow are found in a variety of engineering applications, primarily in the field of microfluidics. Current fluid channel TO is typically done with density-based TO and...
master thesis 2021
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Anunay Prasanna, Anunay (author)
The human body is the subject of several interesting phenomena and blood flow comes under that category. The main motivator for this thesis is the flow of blood in aneurysms. An aneurysm is a sudden expansion of an artery, with large expansion angles causing an adverse pressure gradient and leading to flow separation. Several studies have shown...
master thesis 2021
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Wang, Siyuan (author)
Drinking water temperature is an essential parameter for water quality related to the physical, chemical and biological processes in water. However, in many countries, the drinking water temperature has not been taken seriously and was excluded from water quality standards. For example, in the Netherlands, the temperature of drinking water...
master thesis 2021
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Jacobse, Luuk (author)
In the volatile and demanding current market and in view of frequent implementation of new emission regulations, ship renovations entail more and more radical conversions of higher complexity. Application of optimization methods in the ship maintenance, repair, and conversion industry have been so far frequently overlooked, due to the former...
master thesis 2021
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Toten, Daan (author)
A Fall-Pipe system deposits rock on the seabed for the protection of submerged objects. Due to the irregular motion of a vessel on the waves the accuracy and efficiency of the rock dumping process is limited. This thesis develops a motion compensation system for a modular Fall-Pipe system developed by Vuyk Engneering. From literature it appears...
master thesis 2021
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Bruins Slot, Hilco (author)
The Netherlands is a country prone to flooding. Recent assessments led to the insight that protection levels of many flood defences should be increased. Integrating reinforcement measures is a difficult task as many dikes are situated in densely populated areas. Conventional reinforcement measures include berm construction or the implementation...
master thesis 2021
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Li, X. (author)
A flexible riser is a multi-layered pipe device which enables deep-water production by connecting seabed facilities to floating vessels. To withstand huge hydro-static pressure, it is required to have strong collapse capacities. At present, the collapse capacity of a flexible riser is designed based on a "wet collapse'' concept, in which the...
doctoral thesis 2021
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Li, Z. (author)
Surface cracks are serious threats to the structural integrity of offshore metallic pipes. This dissertation proposes a protocol of composite reinforcement on surface cracked metallic pipes subjected to cyclic loads, aiming to decrease the crack growth rate and prolong the residual fatigue life. The main objective of this dissertation is to...
doctoral thesis 2021
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Wewer, M. (author), Aguilar Lopez, J.P. (author), Kok, M. (author), Bogaard, T.A. (author)
Backward erosion piping is an internal erosion process, which compromises the stability of water retaining structures such as dams and levees. In this paper, we propose a numerical solution that combines a 2D Darcy groundwater solution with Exner's 1D sediment transport mass conservation equation. As an estimate of sediment transport, we...
journal article 2021
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Xu, Yuxin (author), Fang, P. (author), Bai, Yong (author)
Metallic strip flexible pipes (MSFP), a relatively new style of unbonded flexible pipes, are considered as an attractive alternative to traditional submarine pipes. During its reeling operation, it will inevitably confront various complicated loads, which may affect the integrity and safety of MSFP's utilization. In this paper, the tension...
journal article 2021
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Wei, P. (author), Uijttewaal, W.S.J. (author), van Lier, J.B. (author), de Kreuk, M.K. (author)
Accurate rheological characterisation of sewage waste activated sludge (WAS) is of high importance for downstream processing related to optimised sludge pumping and mixing, assessment of energy demands and overall process design. However, to elaborate rheological behaviour is often challenging under dynamic operational conditions in practice....
journal article 2021
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Li, X. (author), Jiang, X. (author), Hopman, J.J. (author)
Flexible risers are designed with strong anti-collapse capacities which enable them to operate in deep-water reservoirs. However, this anti-collapse capacity is susceptible to the pipe curvature in the flooded annulus condition. For the curved riser sections within the touch-down zone, significant reduction of collapse capacity can occur once...
journal article 2021
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Makris, K. (author), Langeveld, J.G. (author), Clemens, F.H.L.R. (author)
Polyvinyl chloride (PVC) sewer pipes have operated for decades in a hostile environment, raising concern among sewer managers over the longevity of their drainage systems. Inspection data (CCTV and Panoramo®) reveals that severe defects have already surfaced, yet it is unknown if the material properties of PVC sewers have been affected. In...
journal article 2021
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Guo, Cheng (author)
In Bangladeshi rural areas, the groundwater may get contaminated with chemical contaminants. Aiming at removing chemical contaminants, piped water supply(PWS) systems were built. However, due to insufficient water quality tests, a lack of households' participation with the monitoring and maintenance of the PWS system, together with a lack of an...
master thesis 2020
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THOMAS, NAYANTARA (author)
When we think about the fact that 70% of the earth is covered by water, it may be easy to assume that water is abundant and that it would never have to be an issue in terms of having a constant supply to drink. In reality, it is a very complex matter for everyone to be able to access and drink safe water. Water is essential to maintain life on...
master thesis 2020
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Huijsman, Nino (author)
The Netherlands has always been threatened by water. To protect flood-prone areas flood defenses have been constructed. To guarantee that they keep meeting the requirements systematic assessments take place. Since 2017, these assessments are performed according to the ‘Wettelijke beoordelingsinstrumentarium’ resulting in a safety judgment...
master thesis 2020
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Draškić, Marko (author)
Large quantities of heat stored in geothermal aquifers can be of interest to satisfy above-ground heating demands. With the use of heatpipes, placed into the aquifers, heat may be passively extracted. Vertical two-phase thermosiphons are considered in this study. As a result of a local increase in the saturation temperature in liquid pools, heat...
master thesis 2020
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Martens, Roland (author)
Ocean Thermal Energy Conversion (OTEC) has been heavily researched and developed over the last decade. However, no commercial scale for OTEC has been reached yet. OTEC is a clean and renewable source of energy which utilizes the seawater temperature difference between the upper and deep ocean layers to generate electricity. The heat exchangers...
master thesis 2020
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