Browsing Faculty of Science and Technology by Title
Now showing items 1001-1020 of 7037
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The cautionary principle in risk management: Foundation and practical use
(Peer reviewed; Journal article, 2019)The precautionary principle is well known among scientists, politicians and the public in general. However, the closely related and broader cautionary principle is not so often referred to. Whereas the precautionary principle ... -
Cavity Size Effects on the Adsorption of CO2 on Pillar[n]arene Structures: A Density Functional Theory Study
(Peer reviewed; Journal article, 2023-08)Carbon dioxide (CO2) is the main greenhouse gas that contributes to the global warming. Therefore, CO2 adsorption is very urgent in the fight to limit global warming below 1.5 degrees Celsius. In this report, the interaction ... -
CBRNE-beredskap i ambulansetjenesten. Et ambulansepersonellperspektiv
(Master thesis, 2023)Denne masteroppgaven tar for seg CBRNE-beredskapen til ambulansepersonell i Bergen. Vi undersøker hvilke hjelpemidler de har i dag for å hjelpe dem med å håndtere CBRNE-hendelser, som kan være ekstremt utfordrende å håndtere. ... -
CCNA-Based Communication Technology Courses
(Peer reviewed; Journal article, 2020-04)Many study programs include courses on communication technology. All these courses explain the basis of communication technology, but they have different levels of detail depending on the study program and the related ... -
cdem: A macOS program for discrete element modeling of tectonic structures
(Peer reviewed; Journal article, 2023-08)cdem is a macOS document-based application for two-dimensional discrete element modeling of tectonic structures and their associated deformation. Documents encapsulate simulations that can be run and explored simultaneously. ... -
Cement bond evaluation
(Masteroppgave/UIS-TN-IKM/2014;, Master thesis, 2014-06-15)As part of completing an oil well strings of casing are inserted into a pre-drilled hole and cemented in place. The twofold purpose of the cement is to provide casing support and hydraulically isolate the annular space to ... -
Cement Placement: An Overview of Fluid Displacement Techniques and Modelling
(Peer reviewed; Journal article, 2021-01)During drilling operations, effective displacement of fluids can provide high-quality cementing jobs, ensuring zonal isolation and strong bonding of cement with casing and formation. Poor cement placements due to incomplete ... -
Cement Plugging of Highly Deviated Wells Displaced in Oil Based Mud
(Masteroppgave/UIS-TN-IPT/2016;, Master thesis, 2016-06-15)When an oil or gas well is not profitable to produce from anymore, it needs to be temporarily or permanent plugged and abandoned (P&A). These operations are required in order to leave a well secured with sufficient barriers ... -
Cement properties characterization from a section retrieved from an oil production well after 33 years of downhole exposure
(Peer reviewed; Journal article, 2021)A unique data set has been constructed based on the study of class G cement recovered from an oil well on the Norwegian continental shelf. The cement was placed between two casing sections and submitted to downhole conditions ... -
Cementing Geothermal Steam Wells
(Masteroppgave/UIS-TN-IPT/2016;, Master thesis, 2016-06)Cementing wells with severe temperatures and/or pressures has become a common matter over the years. Running casing and designing the cement job is very difficult with temperatures above 150°C (300°F) which is a common ... -
Centralization of casings in wells
(Masteroppgave/UIS-TN-IPT/2014;, Master thesis, 2014-06-03)Centralization of casings is very important in order to ensure a high quality well. Poor centralization of casing is often the main reason for bad cement jobs, which forces the operators to perform remedial cementing. This ... -
Cerebral vessel segmentation in contrast CT images
(Masteroppgave/UIS-TN-IDE/2018;, Master thesis, 2018-06-15)Patients with cerebral stroke symptoms are typically examined using CT scanning due to its availability and efficiency. If the stroke is suspected to be ischemic, a contrast agent is injected to increase the contrast in ... -
CFD analysis of gas-particle flow in a scaled circulating fluidized bed
(Masteroppgave/UIS-TN-IKM/2016;, Master thesis, 2016-06)The hydrodynamics of gas-particle flow in a Circulating Fluidized Bed (CFB) system have been studied computationally. The numerical predictions are evaluated against experimental testing done on a 1/9th scale cold CFB ... -
CFD Analysis of Internal Pipe Flows
(Masteroppgave/UIS-TN-IKM/2016;, Master thesis, 2016-06-15)The process piping in the refinery plant does not always have straight pipe geometry. The configuration of these pipelines are usually zigzag or snake-like. The pipe fittings or joints including elbow pipes, blind-tee pipes, ... -
Cfd analysis of low frequency oscillations in Newtonian and non-Newtonian fluids in a vertical pipe
(Peer reviewed; Journal article, 2019)The effect of vertically imposed, low frequency oscillations on the rheology of shear-thinning non- Newtonian fluids are studied numerically by computational fluid dynamics (CFD). Both Newtonian (water) and inelastic ... -
CFD analysis of subsea pipelines and risers.
(Master thesis, 2021)In the master's thesis, an analysis of promising shelf areas in Russia is given for the need to introduce riser systems. The main risers types used in the oil and gas industry are described. The global tasks in work are ... -
CFD analysis of temperature development due to flow restriction in pipeline
(Masteroppgave/UIS-TN-IKM/2015;, Master thesis, 2015-05-29)If the pressure difference in a pipe, up- and downstream of a restriction orifice, is above a critical value, the flow becomes choked and an under-expanded jet occurs. For very large pressure differences, the gas experiences ... -
CFD Analysis of Topographically Induced Turbulence and its Effect on a Fatigue Life Analysis of a Wind Turbine Yaw Gear
(Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06)This master's thesis describes a case study of a turbine farm, where the topography and its effect on turbulence is compared to a fatigue life analysis. -
CFD investigation of blind-tee effects on flow mixing mechanism in subsea pipelines
(Peer reviewed; Journal article, 2022)Blind tees are widely used in subsea pipelines to enhance the mixing conditions of oil and gas products, but their structural design still relies on experience. In this paper, a series of numerical investigations have been ... -
CFD investigation of flow through an orifice inside a pipe
(Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06-14)Flow measurement is found in a large variety of industries and for different types of fluids. Orifice flow meters are widely used for measuring the flow rate in pipelines due to its small size in the piping system and ...