Browsing Studentoppgaver (TN-IKM / TN-IMBM) by Subject "CFD"
Now showing items 1-17 of 17
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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 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 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 simulations of flow around the tandem cylinders close to the seabed
(Masteroppgave/UIS-TN-IKM/2016;, Master thesis, 2016-06-15)CFD is a useful tool for understanding continuum mechanics and analyzing flows, both disturbed and undisturbed. When we analyze flow around cylinders with CFD, we can get numerical results. We have the opportunity to see ... -
CFD Simulations of Vortex-Induced Vibrations of a Subsea Pipeline Near a Horizontal Plane Wall
(Masteroppgave/UIS-TN-IMBM/2018;, Master thesis, 2018-06)Subsea pipelines, when exposed to free spans, can experience vortex-induced vibrations. This phenomenon was described as a resonance condition occurring when the vortex shedding frequency and the natural frequency of a ... -
Computational Fluid Dynamics (CFD) Investigations of Flow-Induced Vibrations of Two Rigidly Coupled Cylinders at High Reynolds Number
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020)Two degree-of-freedom (2-DoF) flow-induced vibrations (FIV) of a single cylinder and two rigidly coupled cylinders are numerically investigated at the Reynolds number of 3.6 × 10^6. Two-dimensional (2D) Unsteady ... -
Computational Fluid Dynamics (CFD) simulation of two-dimensional(2D) cross sectional flow around twin-box girder bridge
(Masteroppgave/UIS-TN-IKM/2017;, Master thesis, 2017-06-15)Flow around a twin-box bridge with a fixed spacing between the decks has been investigated using the two dimensional (2D) Unsteady Reynolds-Averaged Navier–Stokes (URANS) equations with the k–ω Shear Stress Transport (SST) ... -
Evaluation of biomimetic approach to drag reduction of time trial helmet using computational fluid dynamics
(Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06-15)Computational fluid dynamic (CFD) using OpenFOAM are performed to investigate aerodynamics of a time trial bicycle helmet. Mesh generation by the two softwares OpenFOAM and Pointwise are compared, to detect differences ... -
Fully resolved CFD simulation of a tidal stream turbine in bidirectional duct
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020)Renewable energy, in it’s present contribution, is inadequate to meet up with the global energy demand. Though the Tidal current energy is known for its inherent great potential, its impact in the world’s total renewable ... -
Geometry Optimization of Glass Reinforced Plastic (GRP) Subsea Protection Covers
(Masteroppgave/UIS-TN-IKM/2016;, Master thesis, 2016-06)Subsea pipelines are exposed to fishing activity loads and drop-object impacts. Protection covers are used to protect the pipelines from these loads and are manufactured from Glass Reinforced Plastics (GRP) for high strength ... -
Investigation of transitional turbulence models to predict drag crisis for flow over spheres and cylinder
(Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06-14)The current work performed experimental and numerical studies of flow over cylinders and spheres. The purpose is to investigate whether the drag crisis phenomenon can be predicted, and to gain insight into the transition ... -
Numerical and analytical study of steady state and transient heat transfer in liquid filled dead legs
(Masteroppgave/UIS-TN-IKM/2012;, Master thesis, 2012)A dead leg is an inactive part of a process pipe, and it has been the cause of serious incidents due to liquid reaching its threshold value (TV) for freezing. The existing industrial approach for the design of dead legs ... -
Numerical Simulations of Flow Over Bottom-Mounted Structures at High Reynolds Number
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2019-06)A common challenge in on-bottom stability design is to select accurate hydrodynamic quantities, such as drag and lift coefficients, to compute the forces on structures subject to fluid flow. The objective of the present ... -
Optimization of hydroturbine design using CFD
(Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-07-14)In this thesis, research on the possibility of increasing the efficiency and torque generated by a turbine is done. The turbine is driven by a flow that is pumped through pipelines by utilizing the kinetic energy of the ... -
T-junctions in a hydronic system
(Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06)The OpenFoam software with the Computational Fluid Dynamics (CFD) theory is used in this thesis. In this paper the importance of grid resolution and layers are shown. Four different grid resolutions with about 30& reduction ... -
The significance of Froude number in vertical pipes : a CFD study
(Masteroppgave/UIS-TN-IKM/2012;, Master thesis, 2012)The main objective is to develop a simulation model in OpenFOAM which can be used to study the transition from pressure to gravity driven flow in vertical pipelines. A pump is connected upstream, ensuring pressure driven ...