Recent Submissions

  • Risk-Based Control of Autonomous Surface Ship 

    Johansen, Thomas (Doctoral theses at NTNU;2024:174, Doctoral thesis, 2024)
    The last few decades have seen tremendous technological development in the maritime industry. Improvements in navigation systems such as Global Navigation Satellite Systems have reduced measurement error and uncertainty ...
  • Towards carbon-free mobility: The feasibility of hydrogen and ammonia as zero carbon fuels in spark ignition light-duty vehicles 

    Nguyen, Duc Duy; Turner, James W.G (Peer reviewed; Journal article, 2024)
    Global warming is a major environmental issue caused by the release of greenhouse gases, such as carbon dioxide into the atmosphere. Light-duty vehicles (LDVs) including passenger cars and light-duty trucks, are a significant ...
  • Experimental reproduction of inhomogeneous fjord waves 

    Lafleche, Sebastien Jacques Marie; Christakos, Konstantinos; Ommani, Babak; Fouques, Sebastien; Kristiansen, Trygve (Journal article; Peer reviewed, 2024)
    Waves in coastal areas and fjords can present inhomogeneities that affect the responses of very large floating structures. However, spatial inhomogeneities of waves are usually not included in model testing. In this paper, ...
  • Numerical and experimental hydrodynamic study of a vertical circular floating dock in waves 

    Moreau, Maël (Doctoral theses at NTNU;2024:182, Doctoral thesis, 2024)
    A hydrodynamic analysis of a free-floating bottom-less upright circular dock in waves conceived for the installation of spar-type floating offshore wind turbines (FOWT) is carried out in this work for incident wave frequencies ...
  • Simulating emergency response for large-scale fish welfare emergencies in sea-based salmon farming 

    Slette, Hans Tobias; Asbjørnslett, Bjørn Egil; Pettersen, Sigurd Solheim; Erikstad, Stein Ove (Journal article; Peer reviewed, 2022)
    This paper presents a simulation model for analyzing emergency response for fish welfare emergencies in sea-based fish farming. The model enables decision-makers to evaluate the emergency preparedness level against incidents ...
  • Digital Twins for Fault Prognosis in Offshore Wind Turbine Drivetrains 

    Mehlan, Felix Christian (Doctoral theses at NTNU;2024:178, Doctoral thesis, 2024)
    This thesis investigates the relatively novel concept of Digital Twin (DT) in the context of offshore wind turbine drivetrains. DT can be described as a virtual representation of a system or asset that calculates system ...
  • Flow topology in the gap and wake of convex curved tandem cylinders 

    Aasland, Tale Egeberg; Pettersen, Bjørnar; Andersson, Helge; Jiang, Fengjian (Journal article; Peer reviewed, 2023)
    Flow around curved tandem cylinders in the convex configuration has been studied by means of direct numerical simulations, for a Reynolds number of 500 and a nominal gap ratio of 3.0. Spanwise variation of flow regimes, ...
  • Asymmetric cellular bi-stability in the gap between tandem cylinders 

    Aasland, Tale Egeberg; Pettersen, Bjørnar; Andersson, Helge; Jiang, Fengjian (Peer reviewed; Journal article, 2023)
    In the gap region of tandem cylinders, within the reattachment regime, bi-stability is seen to be cellular. Direct numerical simulations at a Reynolds number of 500, and a gap ratio of 3.0, show that shedding of gap vortices ...
  • The Influence of the Rake Angle on the Cutting of Low-Lead and Lead-Free Brass Alloys 

    Müller, Magdalena Susanne; Sørby, Knut (Chapter, 2023)
    Components manufactured from brass alloys are widely used in plumbing systems. Traditionally, lead is added to the alloy to improve the machinability. In recent years, the use of lead has been restricted due to health and ...
  • A phase-time-path-difference approach for online wave direction and wave number estimation from measured ship motions in zero and forward speed using a single inertial measurement unit 

    Dirdal, Johann Alexander; Skjetne, Roger; Roháč, Jan; Fossen, Thor I. (Journal article; Peer reviewed, 2023)
    This study investigates the potential capability of a relatively new and unexplored signal-based approach for shipboard wave estimation. The approach uses the phase-time-path-differences (PTPDs) from an array of shipboard ...
  • Green Smart Port Energy System Design: Optimal Sizing 

    D’Agostino, Fabio; Kaza, Daniele; Silvestro, Federico; Conte, Francesco; Rrukaj, Ritvana; Zadeh, Mehdi (Journal article; Peer reviewed, 2023)
    The paper proposes an optimal sizing methodology for a green smart port with the presence of renewable energy resources and two energy carriers: electricity and hydrogen. The problem solution provides the optimal size of ...
  • Hydroelastic response of a flexible spar floating wind turbine: Numerical modelling and validation 

    Ran, Xiaoming; Vincent, Leroy; Bachynski-Polic, Erin Elizabeth (Journal article; Peer reviewed, 2023)
    This study examines the hydroelastic response of a large floating wind turbine (FWT) through coupled numerical analysis. Four numerical models with different levels of complexity in the hydrodynamic and structural modelling ...
  • Overview of the potential of floating wind in Europe based on met-ocean data derived from the ERA5-dataset 

    Messmer, Thomas; Ran, Xiaoming; Benifla, Victor; Lutz, Marco; Adam, Frank; Bachynski-Polic, Erin Elizabeth; Hölling, Michael (Journal article; Peer reviewed, 2023)
    This paper provides an overview of the potential of floating wind in Europe. Wind and wave data from the ERA5 dataset as well as bathymetry data are analysed to identify regions suitable for floating wind deployment. The ...
  • Flow over a single shallow dimple 

    Zhu, Jianxun; Tian, Cai; Holmedal, Lars Erik (Peer reviewed; Journal article, 2024)
  • Accuracy of a slew maneuver for the HYPSO-1 hyperspectral imaging satellite — in-orbit results 

    Kristiansen, Bjørn Andreas; Langer, Dennis David; Garrett, Joseph Landon; Berg, Simen; Gravdahl, Jan Tommy; Johansen, Tor Arne (Peer reviewed; Journal article, 2023)
    In this paper, the accuracy of a slew maneuver performed by the HYPSO-1 satellite is analysed based on the data received during the satellite’s first months in orbit. The slew maneuver, during which the satellite turns ...
  • Towards carbon-free mobility: The feasibility of hydrogen and ammonia as zero carbon fuels in spark ignition light-duty vehicles 

    Nguyen, Duc Duy; Turner, James W.G (Journal article; Peer reviewed, 2024)
    Global warming is a major environmental issue caused by the release of greenhouse gases, such as carbon dioxide into the atmosphere. Light-duty vehicles (LDVs) including passenger cars and light-duty trucks, are a significant ...
  • Advanced Biomass Conversion : Sustainable e-methanol production with enhanced CO2 utilization 

    Fernandes, Renston Jake; Nguyen, Duc Duy; Raghib Shakeel, Mohammad; Turner, James W.G (Journal article; Peer reviewed, 2024)
    Amid escalating concerns over climate change and emissions, this study presents a novel approach to develop sustainable fuels, leveraging advanced process modeling that uses waste CO2 streams from the biological ethanol ...
  • Committee V.1: Accidental Limit States 

    Quinton, Bruce WT; De luca, Gaetano; Topan, Firmandha; Mihkel, Kørgesaar; Le Sourne, Hervé; Nahshon, Ken; Notaro, Gabriele; parsa, Kourosh; Rudan, Smiljko; Suzuki, Katsuyuki; Banda, Osiris Valdez; walters, Carey; wang, deyu; Yu, Zhaolong (Chapter, 2023)
    Ships and offshore structures may be subject to accidental actions during their operation. Design for preventing or minimizing the effects of accidents is termed accidental limit states (ALS) design and is characterized ...
  • Human-autonomy collaboration in supervisory risk control of autonomous ships 

    Johansen, Thomas; Utne, Ingrid Bouwer (Journal article; Peer reviewed, 2024)
    This paper presents a method for developing and testing a risk-based control system, as a first step towards including the human supervisor explicitly in the design of the system. The result is a control system with improved ...
  • Survey report for CRIMAC SFI 2023 

    Handegard, Nils Olav; Allken, Vaneeda; Holmin, Arne Johannes; Johnsen, Espen; Korneliussen, Rolf; Pedersen, Geir; Skjefstad, Joakim; Rogge, Rabea Patricia; Samuelsen, Mikal Arntzen; Tenningen, Maria; Sivle, Lise Doksæter (Toktrapport;, Research report, 2024)
    This cruise report describes the objectives, methods, and preliminary results from the tasks carried out at the CRIMAC SFI survey. The survey was conducted on board RV G.O. Sars between November 15th (Tromsø) and November ...

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