Browsing Institutt for prosess-, energi- og miljøteknologi by Author "Vågsæther, Knut"
Now showing items 21-31 of 31
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Proceedings of the Tenth International Seminar on Fire and Explosion Hazards, 22-27 May 2022, Oslo, Norway
Vågsæther, Knut; Lach, Agnieszka; Bradley, Derek; Lundberg, Joachim (Conference object; Peer reviewed, 2022)The Tenth International Seminar on Fire and Explosion Hazards (ISFEH10) organized in Oslo, Norway from 22 to 27 May 2022, is a place to share research on the physical effects of hazards, prediction methods for consequences, ... -
A Real-Time Flow-Measuring Algorithm for Open Venturi Channel Non-Newtonian Flow
Welahettige, Prasanna Kumara Welahetti; Lie, Bernt; Vågsæther, Knut (Peer reviewed; Journal article, 2019)A real-time flow measuring algorithm is developed for the open Venturi channel non-Newtonian flow measurement. Using a single level sensor reading at downstream of the open Venturi channel, a drilling-well return flow rate ... -
Release of liquid CO2 from the bottom of a duct
Mohammed Ibrahim, Osama Kabbashi; Gaathaug, Andre Vagner; Hansen, Per Morten; Bjerketvedt, Dag; Vågsæther, Knut (Peer reviewed; Journal article, 2023)This paper presents experimental results of the rapid phase transition of liquid CO2 released from the bottom of a small rectangular duct (BR). The aim is to consider the factors influencing the phase transitions and the ... -
Riemann solver for combustion waves
Vågsæther, Knut (Professional article, 2011-05-03) -
Simulation of burning velocities in gases vented from thermal run-a-way lithium ion batteries
Johnsplass, Jonathan; Henriksen, Mathias; Vågsæther, Knut; Lundberg, Joachim; Bjerketvedt, Dag (Journal article; Peer reviewed, 2017)This paper describes the results from simulations of laminar burning velocities in the premixed air and flammable gases vented from abused Li-ion batteries. The released mixture from such batteries contain mixtures of ... -
Simulation of FA and DDT in a channel with repeated obstacles with an under-resolved mesh
Vågsæther, Knut; Bjerketvedt, Dag (Conference object; Peer reviewed, 2009) -
Simulation of flame acceleration and DDT in H-2-air mixture with a flux limiter centered method
Vågsæther, Knut; Knudsen, Vegeir; Bjerketvedt, Dag (Journal article; Peer reviewed, 2007)Flame acceleration and deflagration to detonation transition (DDT) is simulated with a numerical code based on a flux limiter centered method for hyperbolic differential equations. The energy source term is calculated by ... -
Simulation of flame acceleration in an obstructed tube with LES
Vågsæther, Knut; Bjerketvedt, Dag (Conference object; Peer reviewed, 2007) -
Structural response analysis of explosions in hydrogen-air mixtures in tunnel-like geometries
Bratland, Magne; Bjerketvedt, Dag; Vågsæther, Knut (Peer reviewed; Journal article, 2021)This paper presents a structural response analysis based on the results of experiments involving gas explosions in inhomogeneous hydrogen-air mixtures in a channel. The channel was 3 m long, with a cross-section of 100 mm ... -
Study of Fluidization Regimes using OpenFOAM Computational Fluid Dynamics
Welahettige, Prasanna Kumara Welahetti; Lie, Bernt; Vågsæther, Knut; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2017)The objective of this study was using computational fluid dynamics simulation with OpenFOAM to study the fluidization properties for four types of particles classified as Geldart A, B, C and D. Fluidization regimes were ... -
Thermal Design of Future Medium Voltage Switchgear
Fjeld, Elin; Rondeel, Wilhelm; Vågsæther, Knut; Saxegaard, Magne; Skryten, Pål; Attar, Elham (Conference object; Peer reviewed, 2015)Air is a desirable alternative to SF6 in medium voltage (MV) switchgear. However, the thermal properties of air is poorer compared with SF6, and this paper presents a first step in the process of finding an optimized thermal ...