Browsing Universitetet i Stavanger by Title
Now showing items 2388-2407 of 18886
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Certify or not? The effect of the MSC certification on the ex-vessel prices for Atlantic cod in Norway
(Peer reviewed; Journal article, 2023-07)There is strong evidence that ecolabeled seafood commands a price premium in the retail market in Northern European countries. At the same time, there is significant uncertainty as to whether these markups are passed on ... -
Certify or not? The effect of the MSC certification on the ex-vessel prices for Atlantic cod in Norway
(Peer reviewed; Journal article, 2023)There is strong evidence that ecolabeled seafood commands a price premium in the retail market in Northern European countries. At the same time, there is significant uncertainty as to whether these markups are passed on ... -
Cessation of petroleum activities
(Master thesis, 2023)This thesis examines how the existing Norwegian decommissioning regulation can be made more compatible with key objectives of the circular economy. The research will be carried out through legal doctrinal research, and ... -
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 ... -
CFD investigation of fluid flow within elbow pipes
(Master thesis, 2021)Elbow pipes are crucial parts of many fluid transport systems, including ones used in the oil and gas industry. The curved shape of such pipes induces centrifugal forces on the internal flow, ultimately affecting the flow ... -
CFD Investigation on Hydrodynamic Resistance of a Novel Subsea Shuttle Tanker
(Peer reviewed; Journal article, 2021-12)The Subsea Shuttle Tanker (SST) was proposed by Equinor as an alternative to subsea pipelines and surface tankers for the transportation of liquid carbon dioxide (CO2) from existing offshore/land facilities to marginal ... -
CFD investigation on scour beneath different configurations of piggyback pipelines under steady current flow
(Peer reviewed; Journal article, 2022)Scour beneath piggyback pipelines laid on a sandy seabed is numerically investigated by solving two-dimensional (2D) Unsteady Reynolds-averaged Navier-Stokes (URANS) equations. The fluid flow and the sediment transport are ... -
CFD investigations of scour beneath a submarine pipeline with the effect of upward seepage
(Peer reviewed; Journal article, 2020-12)A numerical model of scour beneath subsea structures considering the effect of upward seepage in the seabed is proposed. A small seepage can cause significant changes to the hydrodynamic force on the bed surface and stability ... -
CFD Modelling of Turbulence around Offshore Structure
(Masteroppgave/UIS-TN-IKM/2016;, Master thesis, 2016-06-15)Leakages of methane from the seabed is a common problem for oil companies, and they are held responsible for leakages surrounding the platforms at sea. These leakages has to be monitored in some way, and Stinger Technology ... -
CFD simulation of an offshore air intake and exhaust system
(Master thesis, 2015-06-15)The main purpose is to investigate whether the exhaust gases from an offshore turbine can be rerouted to heat the air entering the turbine system, thus keeping air humidity concentration above acceptable levels. To ensure ... -
CFD simulation of the flow over a 2-dimensional pipe and vortex induced vibration of the pipe with 1 degree of freedom
(Masteroppgave/UIS-TN-IKM/2015;, Master thesis, 2015-06-16)The fluid that flows through a pipeline free span can generate vortex shedding around the pipe and triggers Vortex Induced Vibration (VIV). This VIV is a major source of fatigue damage due to dynamic stresses in the pipeline ... -
CFD simulation of wind condition and thermal gradient around an offshore helideck
(Masteroppgave/UIS-TN-IØRP/2013;, Master thesis, 2013-06-13)With the development of offshore deep water fields, helicopter transportation and consequently helicopter deck becomes a vital part of these fields that located far from onshore. To ensure helicopter safe operations, ... -
CFD simulations of a suspension bridge deck for different deck shapes with railings and vortex mitigating devices
(Peer reviewed; Journal article, 2019)Aerodynamic response of a single-box suspension bridge girder is investigated using CFD simulations. The importance of including railings and vortex mitigating devices such as guide vanes and a spoiler in the simulations ...