Blar i NTNU Open på tittel

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    • Vortex induced vibrations of free span pipelines 

      Koushan, Kamran (Doktoravhandlinger ved NTNU, 1503-8181; 2009:106, Doctoral thesis, 2009)
      Pipelines from offshore petroleum fields must frequently pass overareas with uneven seafloor.  In such cases the pipeline may havefree spans when crossing depressions. Hence, if dynamic loads canoccur, the free span ...

    • Vortex Induced Vibrations of Marine Risers 

      Knardahl, Geir Magnus (Master thesis, 2012)
      SummaryThis Master s Thesis goal is to present fundamental physical aspects of Vortex Induced Vibrations (VIV) of marine risers, and outline methods for suppression of VIV. Main emphasis has been given to the use of strakes, ...

    • Vortex Induced Vibrations of Pipelines With Non-Linear Seabed Contact Properties 

      Ulveseter, Jan Vidar; Sævik, Svein; Larsen, Carl Martin (Chapter; Peer reviewed, 2016)
      A promising time domain model for calculation of cross-flow vortex induced vibrations (VIV) is under development at the Norwegian University of Science and Technology. Time domain, as oppose to frequency domain, makes it ...

    • Vortex Induced Vibrations of Slender Catenary Structures 

      Simensen, Ingrid Kornberg (Master thesis, 2015)
      A wide range of offshore science and engineering applications utilize slender catenary-shaped structural elements in their design. These applications include moorings and steel catenary riser designs. The susceptibility ...

    • Vortex Induced Vibrations of Slender Marine Structures 

      Brunborg, Maren (Master thesis, 2013)
      The main objective of this thesis is to study the behaviour of slender marine structures exposed to vortex induced vibrations (VIV). Especially the interaction between active response frequencies is important. This is done ...

    • Vortex Induced Vibrations Of Slender Marine Structures: Inverse Analysis 

      Wang, Daming (Master thesis, 2013)
      With the development of the offshore engineering and the increasing of water depth, VIV (vortex induced vibrations) becomes a big challenge of the design of slender marine structures. In engineering field, we use some ...

    • Vortex Induced Vibrations on an ''Artificial Seabed'' for Support of a Floating Bridge 

      Grevstad, Simon (Master thesis, 2015)
      The engineering company Reinertsen is planning a floating bridge with tunnel that will go across the Sognefjord. Reinertsen has designed what they call an "artificial seabed" to be used for anchoring of the floating bridge. ...

    • Vortex Induced Vibrations Response Evaluation 

      Feri, Herliawan (Master thesis, 2010)
      In designing oil and gas pipelines, many aspects should be considered. One of those aspects is fatigue damage due to time varying stresses in the pipe. The stresses in the pipe may be caused by dynamic loads and the most ...

    • Vortex interaction in the wake of a two- and three-bladed wind turbine 

      Bartl, Jan Michael Simon; Hansen, Thomas; Kuhn, Wolf Ludwig; Mühle, Franz Volker; Sætran, Lars Roar (Peer reviewed; Journal article, 2020)
      The vortex interaction in the wake behind a two- and three-bladed model scale wind turbine is investigated. The two rotors have equal solidity, and produce similar power and thrust at the design tip speed ratio. Phase-averaged ...

    • Vortex spin valve on a topological insulator 

      Amundsen, Morten; Hugdal, Henning Goa; Sudbø, Asle; Linder, Jacob (Journal article; Peer reviewed, 2018)
      Spin-valve structures are usually associated with the ability to modify the resistance of electrical currents. We here demonstrate a profoundly different effect of a spin-valve. In combination with a topological insulator ...

    • Vortex system around a step cylinder in a turbulent flow field 

      Tian, Cai; Jiang, Fengjian; Pettersen, Bjørnar; Andersson, Helge Ingolf (Peer reviewed; Journal article, 2021)
      The vortex system around the step surface of a step cylinder with a diameter ratio D/d=2 at Reynolds number (ReD) 3900 was investigated by directly solving the three-dimensional Navier–Stokes equations. Formation mechanisms ...

    • Vortex-induced vibrations of a vertical riser with time-varying tension 

      Thorsen, Mats Jørgen; Sævik, Svein (Journal article; Peer reviewed, 2017)
      Numerical simulations of a vertical tensioned riser in a sheared flow are performed, where the riser top end oscillates sinusoidally in the vertical direction. The oscillating top-end motion causes tension variations and ...

    • Vote Selling Resistant Voting 

      Boyd, Colin Alexander; Haines, Thomas Edmund; Rønne, Peter (Peer reviewed; Journal article, 2020)
      Creating a secure (purely) remote voting scheme which prevents active vote selling is an open problem. Observing that vote selling has a primarily economic motivation, we propose a novel approach to the problem which ...

    • Voter responses to refugee arrivals: Effects of settlement policy 

      Finseraas, Henning; Strøm, Marte (Peer reviewed; Journal article, 2021)
      In this paper we leverage a sudden shift in refugee settlement policy to study the electoral consequences of refugee settlements. After the 2013 Norwegian parliamentary election, the newly elected right-wing government ...

    • Voter Tunrout in the 2019 European Parliament Election: A case study analysis of Hungary, Poland, and Slovakia 

      Bordal, Matilde Brox (Bachelor thesis, 2021)
      Denne oppgaven har som formål å forklare den økte valgdeltakelsen i 2019 valget i Europaparlamentet, samt å legge fram noen forklaringer på denne endringen. Oppgaven legger vekt på situasjonen i Ungarn, Polen og Slovakia ...

    • Voter turnout in direct democracy: A joint analysis of individual, referendum and community factors 

      Goldberg, Andreas; Sciarini, Pascal (Peer reviewed; Journal article, 2021)
      In the context of an ever growing importance and usage of referendums around the globe, this article provides a comprehensive approach to analyse the determinants of participation in direct democratic votes. In the absence ...

    • Vowel Hiatus Resolution in Ewe 

      Motte, Mercy (Master thesis, 2013)
      Vowel hiatus (two adjacent vowels or a sequence of two vowels in different syllables) is one phonological phenomenon that is seen in many languages including Ewe a Kwa language found in Ghana and a few other countries. ...

    • Vox Populi: Population-based Outcome Studies in Testicular Cancer 

      Tandstad, Torgrim (Doktoravhandlinger ved NTNU, 1503-8181; 2011:229, Doctoral thesis, 2011)

    • Vox regis: Royal Communication in High Medieval Norway 

      Brégaint, David (Doktoravhandlinger ved NTNU, 1503-8181; 2014:38, Doctoral thesis, 2014)
      During the high Middle Ages Norwegian kingship gained greater prerogatives in the domains of justice, taxation and physical coercion. The overarching theme of this thesis is to elucidate how this concentration of power and ...

    • Voxelizer: an Open Source Voxelization Engine 

      Storhaug, André (Bachelor thesis, 2020)
      Voxelisering er prosessen å konvertere 3D-modeller til volumetrisk data. Hovedmålet med denne oppgaven er å forbedre open-source Voxelizer-motoren, som er skrevet i JavaScript. For å gjøre voxelisering enkelt og tilgjengelig, ...