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Klein, Robin (author)In this master thesis several novel DEIM formulations are proposed that enable the construction of non-linearly stable hyper-reduced order models (hROMs) of the incompressible Navier-Stokes equations. The hROMs have the same mass, momentum and energy conservation properties as the previously proposed ROM, but they do not suffer of prohibitively...master thesis 2022
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Klaassens, Vincent (author)Due to the energy transition, an increasing number of oil pipelines will be decommissioned in the foreseeable future. As a part of the decommissioning process, the oil needs to be flushed from the pipelines. Some models to predict the required water velocity to flush oil from pipelines are available, but these are limited in accuracy, and data...master thesis 2022
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Verlaan, Edwin (author)Onshore and offshore multiphase pipelines provide a safe and effective solution for the transport of fluids from wells to production plants in the oil and gas industry. For the control of the accumulated amount of liquid present in the pipeline (the so-called liquid holdup) and for the regular maintenance of the pipeline, pigs (Pipeline...master thesis 2021
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PARIKH, KEVAL KETANBHAI (author)The transportation of high viscosity oil is an ongoing research topic for quite some years because of its importance in industrial applications and the increasing energy requirements of the world population. The water lubricated oil core with a core-annular flow configuration is a viable option for the transport of high viscosity oil. It was...master thesis 2021
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Buysse, Sven (author)Currently, the paper producing industry is a significant energy consumer and contributes to the excessive greenhouse emissions. In order to become carbon neutral by 2050, it is evident that the paper industry must become more sustainable as well. Most of the energy is consumed in the dewatering process. Therefore, optimizing this process is key...master thesis 2021
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van Eeden, Bart (author)In the oil and gas industry, it is crucial that the transport of hydrocarbons through long pipelines occurs in the most efficient and safest way. These pipelines can cover up to several tens to hundreds of kilometres. Hydrocarbons are not the only fluids present within the pipelines, often they are filled with a mixture of oil, gas, water and...master thesis 2021
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Vrijlandt, Daan (author)The production of heavy oil from reservoirs requires much more effort than the production of lighter oils. This is due to the fact that this heavy oil has a significantly higher viscosity; namely, typically a factor 10 to 10000 more viscous than water. This higher viscosity makes the transport through pipes less economically viable due to the...master thesis 2020
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Jia, Kangjun (author)The transport of highly-viscous oil in the core-annular flow regime in a horizontal pipe is investigated with a numerical simulation study. In this flow type the viscous oil is lubricated by a water annulus along the pipe wall. The Launder-Sharma low-Reynolds number k-ε turbulence model is used with the Volume-of-Fluid solver in interFOAM. Three...master thesis 2018
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Klinkert, Julia (author)Steady state multiphase flow models are used for the design and operation of pipelines that are used in the oil and gas industry. The predictions obtained with these models contain uncertainties, which arise from model assumptions and simplifications, and from uncertainties in the input parameters. In this thesis we investigate the effect of...master thesis 2018
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de Muijnck, Stan (author)This study was aimed at improving the accuracy of the model predictions for the minimum fluid and inner wall temperatures for cold, low-pressure start-up of wells that produce oil or gas. Due to the large pressure drop over the well head choke, the so-called Joule-Thomson cooling will give a very low temperature of the<br/>expanding gas jet. Low...master thesis 2018
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Pronk, Emilie (author)Oil and gas production systems consist of flows in wells, in horizontal and inclined flowlines and in risers. Due to the reservoir composition and changes in pressure and temperature, the flow is often under multiphase conditions. With time, the reservoir matures and the reservoir pressure decreases. The gas rate drops below a critical gas rate,...master thesis 2017
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van Duin, Erik (author)Transportation of very viscous fluids through pipelines is a real challenge. With the depletion of light oils in reservoirs, it becomes economically favourable to harvest heavy crude oils to contribute to meeting the ever growing energy demand. A suitable candidate for the transportation of these very viscous oil is by means of core-annular flow...master thesis 2017
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IJsseldijk, H.P. (author)Pipelines are used in many industries as a means of transporting fluids, for example in the oil and gas industry. Pigs are devices that move through such pipelines, for instaoce to cleao the pipeline or to perform internal inspections. They are driven by a pressure difference over the pigs. Since this is a risky operation, there is a strong...master thesis 2016
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Hazari, S.A. (author)Stratified two phase flow is one of the flow regimes that is of importance in multiphase flow transport through pipelines, such as used for example in the oil and gas industry. Its application also extends to chemical production, energy conversion and food processing. The phenomenon of turbulence further complicates the stratified flow behaviour...master thesis 2016
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Den Heijer, A. (author)Pigs (pipeline inspection gauges) are free moving piston-like devices, that are used for inspecting or cleaning pipelines in for example the oil and gas industry. Here they are used for onshore and offshore pipelines, where they are propelled by the production fluids. A better control of the velocity of the pig in the pipeline can be achieved by...master thesis 2016
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Liang, X. (author)In the oil and gas industry, pipeline networks are used to transport the production fluids from wells to production plants. During normal operation, the pipelines need regular cleaning and inspection. Typically, the pipeline maintenance is performed by pigging, which refers to using devices known as “pigs ”(Pipeline Inspection Gauges) to perform...master thesis 2015
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Joshi, S. (author)Natural gas wells produce small amount of liquids along with the gas. During the initial part of the reservoir life, the gas velocity in the well tubing is large enough to drag the liquid upwards. As the well matures, the reservoir pressure starts to decline leading to a decline in the gas velocity in the tubing; here the gas momentum is not...master thesis 2015
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Kawale, D. (author)In natural gas production, along with gas, a small amount of liquid is produced. Towards the end of a reservoir life, the gas velocity reduces due to a decline in pressure. A low gas velocity in a gas well causes undesirable liquid accumulation (loading) in the production tubing. One of the ways to postpone liquid loading is by injecting...master thesis 2012
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- Ramdin, M. (author) master thesis 2010