Browsing NTNU Open by Author "Berthelsen, Petter Andreas"

Now showing items 1-7 of 7

    • An immersed interface method for two-dimensional modelling of stratified flow in pipes 

      Berthelsen, Petter Andreas (Doktoravhandlinger ved NTNU, 1503-8181; 2004:139, Doctoral thesis, 2004)
      This thesis deals with the construction of a numerical method for solving two-dimensional elliptic interface problems, such as fully developed stratified flow in pipes. Interface problems are characterized by its non-smooth ...

    • CFD Based Study of Steep Irregular Waves for Extreme Wave Spectra 

      Aggarwal, Ankit; Alagan Chella, Mayilvahanan; Bihs, Hans; Pakozdi, Csaba; Berthelsen, Petter Andreas; Arntsen, Øivind Asgeir (Journal article; Peer reviewed, 2017)
      Offshore structures are exposed to irregular sea states. It consists of breaking and non-breaking waves. They experience extreme wave loads perpetually after being installed in the open ocean. Thus, the study of steep waves ...

    • Definition of the INO WINDMOOR 12 MW base case floating wind turbine 

      Silva de Souza, Carlos Eduardo; Berthelsen, Petter Andreas; Eliassen, Lene; Bachynski, Erin Elizabeth; Engebretsen, Espen; Haslum, Herbjørn (Research report, 2021)
      WINDMOOR is a Competence Building Project (KPN), with the main objective of improving the understanding of loads governing the mooring system design of floating wind turbines (FWTs). As a base case, the project adopts a ...

    • Hydrodynamic modelling and estimating response of a glacial ice near a drilling rig 

      Ommani, Babak; Berthelsen, Petter Andreas; Lie, Halvor; Aksnes, Vegard Øgård; Løland, Geir (Chapter, 2019)
      Impact scenarios involving a typical drilling rig and glacial ice are studied. The goal is to better identify the important physical effects in modelling the dynamics of glacial ice in presence of waves and a floating ...

    • Numerical Investigation of Irregular Breaking Waves for Extreme Wave Spectra Using CFD 

      Aggarwal, Ankit; Alagan Chella, Mayilvahanan; Bihs, Hans; Pakozdi, Csaba; Berthelsen, Petter Andreas; Arntsen, Øivind Asgeir (Chapter, 2017)
      Offshore structures are exposed to irregular sea states. It consists of breaking and non-breaking waves. They experience breaking wave loads perpetually after being installed in the open ocean. Thus, the study of wave ...

    • Numerical simulation and comparison with experiments of a floating wind turbine using a direct forcing method 

      Berthelsen, Petter Andreas; Thys, Maxime; Kamath, Arun Mulky; Martin, Tobias; Bihs, Hans Sebastian (Chapter, 2022)
      The open-source Computational Fluid Dynamic (CFD) code REEF3D is used to simulate the hydrodynamic loads and motion response of a floating wind turbine substructure, the INO WINDMOOR semisubmersible floating wind turbine. ...

    • On Common Research Needs for the Next Generation of Floating Support Structures 

      Aksnes, Vegard Øgård; Alsos, Hagbart Skage; Bachynski-Polic, Erin Elizabeth; Berthelsen, Petter Andreas; Delhaye, Virgile Roger; Furevik, Birgitte Rugaard; Jostad, Hans Petter; Kristiansen, Trygve; Ommani, Babak (Chapter, 2022)