Blar i Institutt for energi og prosessteknikk på forfatter "Ytrehus, Tor"
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A CFD-model of the Fluid Flow in a Hydrogen Peroxide Monopropellant Rocket Engine in ANSYS Fluent 16.2
Vestnes, Frida (Master thesis, 2016)The use of hydrazine in monopropellant thrusters has dominated the market for several decades. Due to the toxic nature of hydrazine, the interest in developing thrusters based on green propellants has increased. A common ... -
Comparison of kinetic theory evaporation models for liquid thin-films
Aursand, Eskil; Ytrehus, Tor (Journal article; Peer reviewed, 2019)We summarize the background and derivation of non-equilibrium evaporation models from kinetic theory, and demonstrate how they may be applied in the context of fluid mechanics and heat transfer problems. We find that the ... -
Displacement of Non-Newtonian Fluids in Annular Spaces
Nguyen, Tri Thanh (Master thesis, 2018)A successful cement job is determined by the displacement efficiency. Displacement of drilling fluids in horizontal annuli is a critical element in the completion of wellbores. Optimum displacement requires an understanding ... -
Film boiling and rapid phase transition of liquefied natural gas
Aursand, Eskil (Doctoral theses at NTNU;2019:70, Doctoral thesis, 2019)When liquefied natural gas (LNG) is spilled onto water there is a possibility that explosive rapid phase transition (RPT) events occur. According to experiments, these vapor explosions are highly unpredictable, with yields ... -
Kontroll av oljeutslipp frå havbotn: Control of Oil Spill at Sea Bed
Vrålstad, Eivind (Master thesis, 2011)Med inspirasjon frå lekkasja etter «Deepwater Horizon»/Macondobrønnulukka i2010, er det foreslått og modellert eit nytt system for innfanging og oppsamlingav olje rett frå brønnhovudet ved lekkasje på store havdjup. Dette ... -
Modelling and Measuring Transient Flow in Natural Gas Pipelines: Effect of Ambient Heat Transfer Models
Oosterkamp, Antonie (Doctoral thesis at NTNU;2016:163, Doctoral thesis, 2016)The central question of this thesis is how and to what extent the representation of ambient heat transfer in the calculation models contributes to observed deviations between modelled and measured flow parameters in natural ... -
Numerical Simulation of Multiphase Pipelines
Andersen, Marte Bøe (Master thesis, 2007)The multiphase flow simulators OLGA 5 and LEDA version 1.05 are tested against experimental data and field data. Experimental data on gas-condensate flow in a high pressure flow loop (inclined pipe project), and on air-water ... -
The potential of extracting wave energy from rip currents
Chabaud, Valentin (Master thesis, 2011)Existing wave energy converters are only based on a few ways to produce electricity from ocean waves. All of them suffer from low cost-efficiency so the proposal of new technologies is still up to date. This is a preliminary ... -
Thermocapillary instability as a mechanism for film boiling collapse
Aursand, Eskil; Davis, Stephen H.; Ytrehus, Tor (Journal article; Peer reviewed, 2018)We construct a model to investigate the interfacial stability of film boiling, and discover that instability of very thin vapour films and subsequent large interface superheating is only possible if thermocapillary ... -
Transient dynamikk i gasstransport
Lyssand, Torbjørn (Master thesis, 2011)Beregningsmodeller som i dag brukes til prediksjon og overvåkning av gasstransport, er stort sett basert på 1 dimensjonale betraktninger. Friksjonsfaktoren som brukes i disse modellene er gjerne av typen Colebrook-White, ... -
Transient Flow in Gas Transport
Gjerde, Joachim Dyrstad (Master thesis, 2011)Transport of natural gas to continental Europe and UK is a large portion ofNorwegian petroleum industry. The gas is mainly transported undersea inlarge-scale transport pipelines. Amount of transported gas is currently ...