Blar i UiS Brage på forfatter "Giljarhus, Knut Erik Teigen"
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Investigation of transitional turbulence models for CFD simulation of the drag crisis for flow over a sphere
Nakhostin, Seyedeh Mona; Giljarhus, Knut Erik Teigen (Peer reviewed; Journal article, 2019)The drag crisis is an interesting physical phenomenon for flow over bluff bodies, where the drag coefficient suddenly drops as the Reynolds number increases. This behavior is caused by the flow transitioning from laminar ... -
Modelling of hydrocarbon gas and liquid leaks from pressurized process systems
Bahuguni, Anand; Kumara, Amaranath S.; Giljarhus, Knut Erik Teigen (Peer reviewed; Journal article, 2019)The hydrocarbon leaks from process systems potentially lead to hazardous consequences with regard to human safety, environmental pollution and valuable assets. The hydrocarbon leaks may be gas leaks, liquid leaks or ... -
Numerical investigation of wind load acting on a ground fixed solar panel.
Darhouane, Abderrafie (Master thesis, 2022)The photovoltaic panels are one of the most important components to achieve the goal of decarbonization of the electricity and energy sectors. With the use of ANSYS Fluent, an advanced computational fluid dynamics (CFD) ... -
Optimalisering og markedsanalyse av energimaskinen WorldPower Energy.
Peskovic, Sadid Gagi; Peskovic, Admir (Master thesis, 2021)Del 1 (1) av denne oppgaven tar for seg en teoretisk og eksperimentell forskning om Archimedes Buoyancy Principle (ABP). Spesielt fokuserer forskningen på den nåværende definisjonen av størrelsen (magnitude) og retningen ... -
Optimization and market analysis of the energy machine WorldPower Energy.
Peskovic, Sadid Gagi; Peskovic, Admir (Master thesis, 2021)Part I (1) of this thesis provides theoretical and experimental research on the Archimedes Buoyancy Principle (ABP). In particular, the research focuses and emphasizes on the current definition of the magnitude and direction ... -
Pedestrian Wind Comfort Assessment Using Computational Fluid Dynamics Simulations With Varying Number of Wind Directions
Hågbo, Trond-Ola; Giljarhus, Knut Erik Teigen (Peer reviewed; Journal article, 2022-07)The construction of a building inevitably changes the microclimate in its vicinity. Many city authorities request comprehensive wind studies before granting a building permit, which can be obtained through Computational ... -
Simulation of S-Shaped Airfoil for a Bidirectional Tidal Stream Turbine
Putri, Anastasia Shintami (Master thesis, 2022)The energy supplies in the world mostly rely on fossil fuels which are responsible for increasing the greenhouse effect and global warming by releasing carbon emissions. As global warming is a serious issue for both ... -
The performance of structured and unstructured grids on wind simulations around a high-rise building
Hågbo, Trond-Ola; Giljarhus, Knut Erik Teigen; Qu, Sen; Hjertager, Bjørn H (Journal article; Peer reviewed, 2019)In this study, computational fluid dynamics has been applied to analyze the performance of both structured and unstructured meshes when used in steady-state simulations of wind in an urban area. This case specifically ... -
Topology Optimization Using the Lattice Boltzmann Method
Hoch, Angela (Master thesis, 2021)Human design is limited by our ideas of geometries. Topology optimization is a tool to cross that barrier and improve design especially for applications that are irrevocable once they are in use. This thesis presents a ... -
Use of ANN for monitoring application of a distributed energy generation system based on mGT
Dinh, Tina (Master thesis, 2022)In today's dynamic energy landscape, renewable energy sources are steadily increasing their share of electricity on the grid. The world population recognises the benefits of going carbon neutral and is now willing to invest ... -
Validation and assessment of different RANS turbulence models for simulating turbulent flow through an orifice plate
Jurga, Agata Patrycja; Janocha, Marek Jan; Yin, Guang; Giljarhus, Knut Erik Teigen; Ong, Muk Chen (Peer reviewed; Journal article, 2021)In the present study, numerical simulations using different Reynolds-Averaged Navier–Stokes (RANS) turbulence models are carried out to investigate the turbulent flow through the orifice plate at Reynolds number (Re) of ... -
Vibration-assisted annular fluid displacement for rig-less well abandonment operations
Skadsem, Hans Joakim; Giljarhus, Knut Erik Teigen; Øijordsbakken Fredheim, Fiona; van Riet, Egbert; Keultjes, Wout J. G. (Peer reviewed; Journal article, 2022-06)Through-tubing abandonment is the operation where the production tubing is cut or punched and cemented inside the production casing. This can establish a full cross-sectional barrier or isolation in wells where the cement ... -
Virtual skeleton methodology for athlete posture modification in CFD simulations
Giljarhus, Knut Erik Teigen; Liland, Fredrik Fang; Oggiano, Luca (Peer reviewed; Journal article, 2023)This study focuses on the aerodynamic influence of athlete posture in sports aerodynamics. To analyze a specific posture, wind tunnel measurements and computer simulations are commonly employed. For computer simulations, ... -
Wind Flow Simulation over Fish Farm Feed Barge
Nuland, Svein Erik (Masteroppgave/UIS-TN-IKM/2017;, Master thesis, 2017-06-15)There are approximate over 1000 fish farms in Norway, where half are connected to the grid and the rest are driven by diesel generators. Fish farms use large air compressors to feed the fish, which creates high power ...