Browsing NTNU Open by Title
Now showing items 32500-32519 of 100788
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Experimental and Modeling Studies of Fermentative Butanol Production from Lignocellulosic Sugars
(Doctoral theses at NTNU;2019:378, Doctoral thesis, 2019)The primary focus of the work performed and summarized in this thesis was to understand and improve anaerobic fermentation of lignocellulosic sugars for butanol production by Clostridia. Experimental studies form the basis ... -
Experimental and modeling study of subsea releases of oil and gas. - Oil behavior and effects in a cold or Arctic marine environment as a function of release conditions, oil chemistry and dispersant injection.
(Master thesis, 2015)Abstract With oil exploration going into deeper waters and more extreme environments, more detailed knowledge is needed about the fate of oil in case of a release. This thesis focuses on initial droplet formation, secondary ... -
Experimental and modeling study of the droplet dynamics related to liquid-liquid separators
(Master thesis, 2013)Separators are an integral part of oil and gas processing equipment. A high enough level of separation is needed both due to the sales specifications of the finished products, but also due to the effect poor separation may ... -
Experimental and modelling study of subsea oil releases: focusing on small leaks from an aging oilfield off the Norwegian Continental Shelf
(Master thesis, 2019)With advances in exploration and extraction technology, oilfields that would otherwise have been ready for decommission are expected to produce oil for many more years. While beneficial to extract as much resource as ... -
Experimental and Numerical Analysis of Combined In-line and Cross-flow Vortex Induced Vibration
(Doctoral Theses at NTNU, 1503-8181; 2013:23, Doctoral thesis, 2013)This thesis presents results from experimental and numerical investigations of the hydrodynamic forces on a rigid cylinder moving with prescribed orbits in uniform flow. The hydrodynamic forces are measured in both in-line ... -
Experimental and numerical analysis of TIG-dressing applied to a steel weldment
(Journal article; Peer reviewed, 2018)Fatigue strength of welded joints is controlled above all by notch defects such as weld toe and weld root that act as stress concentrators. This is the reason why over the last years different post-weld fatigue improvement ... -
Experimental and numerical analysis of wind field effects on the dynamic responses of the 10 MW SPIC floating wind turbine concept
(Journal article; Peer reviewed, 2022) -
Experimental and Numerical Assessment og the Hydrogeological Behaviour of the Soil-Rock Interface
(Master thesis, 2014)Experimental and Numerical Assessment of the Hydrogeological Behaviour of the Soil-Rock Interface is written by Hallvard Haugen Nordbrøden. It is a master s thesis written at the Department of Geology and Mineral Resources ... -
Experimental and numerical comparisons of hydrodynamic responses for a combined wind and wave energy converter concept under operational conditions
(Journal article; Peer reviewed, 2016)The spar torus combination (STC) concept is a combined wind and wave energy converter concept that is composed of a spar floating wind turbine and a torus-shaped, heaving-body wave energy converter (WEC). The WEC is installed ... -
Experimental and Numerical Determination of the Head Loss of a Pressure Driven Flow through an Unlined Rock-Blasted Tunnel
(Peer reviewed; Journal article, 2020)The friction loss in a part of the rock-blasted unlined tunnel of the Litjfossen hydropowerplant in Norway was determined from experimental and numerical studies. Remote sensing datafrom the prototype tunnel provided the ... -
Experimental and numerical evaluations of ultra-light uniform lattice structures under quasi-static loading conditions
(Master thesis, 2023)Nylig har det vært en økning i interesse for 3D-printet TPMS gitterstrukturer. Utviklingen av 3D-printet produksjon har gjort det mulig å fremstille komplekse strukturer med særegne egenskaper. Tre typer gitterstrukturer ... -
Experimental and numerical fretting fatigue using a new test fixture
(Peer reviewed; Journal article, 2020)A unique dovetail-based test fixture for fretting fatigue was designed and is demonstrated with a combined experimental and numerical campaign. Fretting fatigue damage is analysed and correlated with numerical analyses ... -
Experimental and Numerical Hydrodynamic Analysis of a Damaged Ship Section In Waves
(Doctoral theses at NTNU;2020:361, Doctoral thesis, 2020)In the past few decades, ships have become larger, efficient, durable but the danger of accidental events like grounding, collision etc. continues to be a major issue in ship operations. Following a damage event, a ship ... -
Experimental and numerical icing penalties of an S826 airfoil at low Reynolds numbers
(Peer reviewed; Journal article, 2020)Most icing research focuses on the high Reynolds number regime and manned aviation. Information on icing at low Reynolds numbers, as it is encountered by wind turbines and unmanned aerial vehicles, is less available, and ... -
Experimental and numerical investigation of a bend-diffusor configuration
(Doktoravhandlinger ved NTNU, 1503-8181; 2003:98, Doctoral thesis, 2003)The current work has dealt with an axial to radial bend-diffuser configuration. The configuration is used behind axial compressors when axial space is limited. To the authors knowledge no work has been reported onthis type ... -
Experimental and Numerical Investigation of a Double-Acting Offshore Vessel Performance in Level Ice
(Journal article; Peer reviewed, 2014)In this paper a numerical model and experimental data are used to investigate the level ice performance of a double-acting intervention vessel. The icebreaking capability and maneuverability in level ice are analyzed by ... -
Experimental and numerical investigation of a freefall wedge vertically entering the water surface
(Journal article; Peer reviewed, 2015)Experiments and numerical methods are developed to investigate the water entry of a freefall wedge with a focus on the evolution of the pressure on the impact sides (the side contacting water) and the top side (the dry ... -
Experimental and numerical investigation of a marine biomass slurry
(Master thesis, 2021)Det er en betydelig andel restråstoff som ikke blir fullstendig utnyttet. Noe av dette restråstoffet kan prosesseres til høy-verdiprodukter ved hjelp av enzymatisk hydrolyse. En ny, kontinuerlig metode har blitt foreslått ... -
Experimental and numerical investigation of a moored floating structure in waves
(Master thesis, 2019)Floating structures play a major role in a wide range of traditional industrial branches as well as in recently developing sectors such as renewable energies. An accurate prediction of the movement of floating structures ...