Browsing SINTEF Open by Author "Skjetne, Paal"
Now showing items 1-12 of 12
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Comparison of ultrasound vector flow imaging and CFD simulations with PIV measurements of flow in a left ventricular outflow trackt phantom - Implications for clinical use and in silico studies
Leinan, Paul Roger; Grønli, Thomas; Skjetne, Paal; Wigen, Morten Smedsrud; Urheim, Stig; Løvstakken, Lasse; Dahl, Sigrid Kaarstad (Peer reviewed; Journal article, 2022)In this study we have compared two modalities for flow quantification from measurement data; ultrasound (US) and shadow particle image velocimetry (PIV), and a flow simulation model using computational fluid dynamics (CFD). ... -
Governing physics of shallow and deep subsea gas release
Olsen, Jan Erik; Skjetne, Paal (SINTEF Proceedings;1, Chapter; Conference object; Peer reviewed, 2015)A modelling concept for studying the resulting bubble plume from a subsea gas release is presented. Simulation results show good consistency with available experimental data. The modelling concept is applied to assess the ... -
Mass transfer between bubbles and seawater
Olsen, Jan Erik; Dunnebier, Dorien; Davies, Emlyn John; Skjetne, Paal; Morud, John (Peer reviewed; Journal article, 2017)Mass transfer between bubbles and seawater is an important mechanism when determining how much gas reaches the atmosphere from gas sources at the seabed. The mass transfer coefficient is a governing parameter for the ... -
Numerical modelling of high-power laser spot melting of thin stainless steel
Bunaziv, Ivan; Danielsen, Morten Høgseth; Eriksson, Magnus Carl Fredrik; Ma, Xiang; Ren, Xiaobo; Godinez Brizuela, Omar Emmanuel; Skjetne, Paal (Peer reviewed; Journal article, 2023)Numerical modelling is an important scientific tool in laser materials processing to study different melting, evaporation, and solidification phenomena. It can assist in understanding why certain defects are formed, and ... -
Numerical Simulations of Grout Flow in Simplified Geometries
Skjetne, Paal; Mo, Sjur (SINTEF Rapport;1504-9795, Research report, 2017) -
ON THE SURFACING MECHANISM OF BUBBLE PLUMES FROM SUBSEA GAS RELEASE
Olsen, Jan Erik; Skjetne, Paal (Chapter, 2017)A subsea release of gas poses a risk to humans and assets at the surface. Assessing this risk requires knowledge on how much gas reaches the surface and how it is distributed at the surface. This can be estimated by various ... -
Rheological characterization of Polyanionic Cellulose solutions with application to drilling fluids and cuttings transport modeling
Busch, Alexander; Myrseth, Velaug; Khatibi, Milad; Skjetne, Paal; Hovda, Sigve; Johansen, Stein Tore (Journal article; Peer reviewed, 2018)In petroleum drilling, aqueous Polyanionic Cellulose solutions (PAC) are often used as a drilling fluid model system in experimental laboratory studies to investigate cuttings transport. Cuttings transport refers to the ... -
Summarizing an Eulerian–Lagrangian model for subsea gas release and comparing release of CO2 with CH4
Olsen, Jan Erik; Skjetne, Paal (Peer reviewed; Journal article, 2020)A subsea gas release is a concern for both safety and environment. This can be assessed by mathematical models. The development of an Eulerian–Lagrangian modelling concept to study subsea gas release has taken place over ... -
The effect of chordae tendineae on systolic flow
Morud, John; Skjetne, Paal; Urheim, Stig; Dahl, Sigrid Kaarstad (Journal article; Peer reviewed, 2019)When using Computational Fluid Dynamics to simulate ventricular blood flow in the heart, it has been common practice to neglect the effect of the sub-valvular apparatus and the trabeculae on the flow conditions. In this ... -
Velocity profiles in a 2D model of the left ventricular outflow tract, pathological case study using PIV and CFD modeling
Leinan, Paul Roger; Skjetne, Paal; Morud, John; Urheim, Stig; Dahl, Sigrid Kaarstad (SINTEF proceedings;2387-4295, Chapter; Peer reviewed, 2017)In the current study, we present an experimental (in vitro) 2D flow model for studying blood flow in the human left ventricular outflow tract (LVOT) and the first part of the aorta using particle image velocimetry (PIV) ... -
Virtual Proof of Concept - Can large scale bubble curtains lower the surface temperature ocean waters
Skjetne, Paal; Slagstad, Dag (Research report, 2021)Computer simulations were used to investigate the potential of large-scale bubble curtains for lowering the sea surface temperature locally and regionally. Large scale simulations of this type have not been reported in the ... -
VLES turbulence model for an Eulerian–Lagrangian modeling concept for bubble plumes
Olsen, Jan Erik; Skjetne, Paal; Johansen, Stein Tore (Peer reviewed; Journal article, 2017)Traditional Reynolds-averaged Navier–Stokes (RANS) approaches to turbulence modeling, such as the k-ϵ model, have some well-known shortcomings when modeling transient flow phenomena. To mitigate this, a filtered URANS model ...