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Numerical Study of Potential and Viscous, Nonlinear, Effects for Wave Drift Loads on Offshore Structures
(Master thesis, 2022)Flytende offshore konstruksjoner utsatt for miljøbelastninger er ofte forankret for å kontrollere posisjonen til konstruksjonen. Forankringen må ta høyde for bølgelaster, da spesielt bølgedriftsbelastninger, før konstruksjonen ... -
Numerical Study of Radiation Hazard from Advanced Flare Systems at Process Plants
(Master thesis, 2016)This thesis investigates how to optimize the calculation of thermal radiation from an advanced flare system in the numerical computation tool Kameleon FireEx (KFX). Measured radiation levels from a real flaring scenario ... -
Numerical Study of Seabed Boundary Layer Flow around Monopile and Gravity-based Wind Turbine Foundations
(Master thesis, 2015)Computational fluid dynamics (CFD) has been used to study the boundary layer flow around three different bottom-fixed offshore wind turbine foundation designs. Two of the designs are gravity-based foundations, where one ... -
A numerical study of separation and stagnation points for steady and unsteady flow over an elliptic cylinder near a moving wall
(Peer reviewed; Journal article, 2021)Flow separation around an elliptic cylinder with an aspect ratio of 0.4 near a moving wall is investigated numerically for Re 2 ½5; 150 with G=D 2 ½0:1; 2 (where G denotes the distance between the cylinder bottom and the ... -
Numerical Study of Soil Nailing Technique - Empirical, classical limit equilibrium and 2D-3D FEM applications
(Master thesis, 2016)Literature review was conducted on the state-of-the art and the state-of-the practice of the soil nailing technique. The literature review focused on design analysis and constructional aspects of the soil nailing technique ... -
Numerical study of surface waves on a shear current - Waves behind a surface obstacle
(Master thesis, 2018)This master's thesis has made investigation into waves and currents interaction numerically by the use of an oscillating cylinder as a wave-maker. Three cases were investigated: still water, uniform flow and linear shear ... -
Numerical study of the droplet-interface dynamic related to liquid-liquid separators
(Master thesis, 2013)The CFD package OpenFoam with the VOF approach of the interFoam solver is used to simulate water drops in Exxsol D80 oil, with diameter ranging from 100 micrometer to 1000 micrometer. Parasitic currents are caused by the ... -
Numerical study of the effect of cement defects on flexural-wave logging
(Journal article; Peer reviewed, 2019)Cement-bond evaluation is needed for new wells and plug and abandonment activities. The ultrasonic leaky Lamb-wave (also called the flexural-wave) technique, in combination with the pulse-echo technique, has been widely ... -
A Numerical Study of the Hydrodynamics of an Offshore Fish Farm Using REEF3D
(Chapter, 2021)In this paper, the CFD framework REEF3D is utilized to investigate the hydrodynamics of a large offshore fish farm in waves. The solver consists of a rigid body dynamics solver for the frame structure coupled to a fluid ... -
Numerical Study of the Interaction between Level Ice and Wind Turbine Tower for Estimation of Ice Crushing Loads on Structure
(Journal article; Peer reviewed, 2019)In this paper, the interaction between level ice and wind turbine tower is simulated by the explicit nonlinear code LS-DYNA. The isotropic elasto-plastic material model is used for the level ice, in which ice crushing ... -
Numerical Study of the Interaction of Flow over Two Airfoils in Relative Motion
(Master thesis, 2011)Computational fluid dynamics (CFD) was be used to investigate aspects of interaction of flow over two airfoils in relatie motion in detail.%Problem statement2D tandem airfoil setups were studied, where the leading airfoil ... -
Numerical study of unsteady flow in slits and investigation of methods to reduce pressure pulsations in pipes
(Master thesis, 2020)Noe av vannet som strømmer gjennom en Francis turbin lekker opp over løpehjulet mot øvre lokk. Dette vannet evakueres gjennom små spalter i lokket, og ledes videre gjennom et rørsystem til et kjølevannsbasseng. Virvelavløsninger ... -
A numerical study of variational discretizations of the Camassa–Holm equation
(Peer reviewed; Journal article, 2021)We present two semidiscretizations of the Camassa–Holm equation in periodic domains based on variational formulations and energy conservation. The first is a periodic version of an existing conservative multipeakon method ... -
Numerical Study of Wave Characteristics during Density Wave Oscillations in a horizontal, heated Channel
(Master thesis, 2014)Boiling flow in steam generators, water cooled reactors and other multiphase processes can be subject to instabilities. One of the main types of instabilities is DWO, a low amplitude and high frequency phenomenon. DWO can ... -
Numerical study of wave transformation using the free surface reconstruction method
(Chapter, 2017)The study of irregular wave field is complex due to its random hydrodynamic characteristics. Many experimental studies have been performed in the past to study irregular waves. However, numerical investigations are less ... -
Numerical Study on a Floating Wind Turbine in Intermediate Depth
(Master thesis, 2017)Floating wind turbines are considered to be a promising source for renewable energy. Offshore wind power production is moving towards larger turbines and deeper water, and FWT's can unlock areas of rich wind resources ... -
Numerical Study on Aerodynamic Damping of Floating Vertical Axis Wind Turbines
(Journal article; Peer reviewed, 2016)Harvesting offshore wind energy resources using floating vertical axis wind turbines (VAWTs) has attracted an increasing interest in recent years. Due to its potential impact on fatigue damage, the aerodynamic damping ... -
Numerical Study on Autonomous Inflow Control Devices: Their Performance and Effects on the Production from Horizontal Oil Wells with an Underlying Aquifer
(Master thesis, 2018)The study of Autonomous ICDs was done as the comparative study with passive ICDs, whereby the horizontal wells completed with ICDs, AICDs, and AICVs were perforating in four different numerical reservoir models including ... -
Numerical study on buckling of aluminum extruded panels considering welding effects
(Peer reviewed; Journal article, 2022)Aluminum extruded panels are increasingly used in marine structures as lightweight solutions. Less welding is needed for such extrusions than traditional built-up panels of welding stiffener to plate sheets. However, the ... -
A Numerical Study on Ductile Failure of Porous Ductile Solids With Rate-Dependent Matrix Behavior
(Peer reviewed; Journal article, 2020)This work examines the effects of loading rate on the plastic flow and ductile failure of porous solids exhibiting rate-dependent behavior relevant to many structural metals. Two different modeling approaches for ductile ...