• CFD investigation in scale effects on propellers with different blade area ratio 

      Chen, Zicheng (Master thesis, 2015)
      The performance prediction of marine propulsor has long been assessed by means of model test. Due to the larger difference in Reynolds number between model and full scale, the traditional extrapolation of measured force ...
    • Characteristics of reversible-pump turbines 

      Olimstad, Grunde (Doktoravhandlinger ved NTNU, 1503-8181; 2012:301, Doctoral thesis, 2012)
      The primary goal for this PhD project has been to investigate instability of reversiblepump turbines (RPTs) as a phenomenon and to find remedies to solve it. The instability occurs for turbines with s-shaped characteristics, ...
    • Computional fluid dynamics (CFD) study on free surface anti-roll tank and experimental validation 

      Li, Yue (Master thesis, 2015)
      The excessive motion of a ship can seriously degrade the performance of machinery and personnel. Anti-roll tanks are tanks fitted onto ships in order to improve their response to roll motion, which is typically the largest ...
    • Depressurization of in a pipe: Effect of initial state on non-equilibrium two-phase flow 

      Log, Alexandra Metallinou; Hammer, Morten; Deng, Han; Austegard, Anders; Hafner, Armin; Munkejord, Svend Tollak (Peer reviewed; Journal article, 2023)
      It is key in several industrial applications to accurately describe rapid depressurization of liquid and dense phase states. Examples include refrigeration systems, nuclear reactor cooling and capture and storage (CCS). ...
    • Experimental Investigations of Breaking Wave Impact Forces on a Monopile Substructure for Offshore Wind Turbines Under Regular Breaking Waves 

      Chakkurunni Palliyalil, Vipin; Rajamanikkam, Panneer Selvam; Alagan Chella, Mayilvahanan; Govindasamy, Vijaya Kumar (Chapter, 2017)
      The main objective of the paper is to investigate wave impact forces from breaking waves on a monopile substructure for offshore wind turbine in shallow waters. This study examines the load assessment parameters relevant ...
    • HLLC-type methods for compressible two-phase flow in ducts with discontinuous area changes 

      Log, Alexandra Metallinou; Munkejord, Svend Tollak; Hammer, Morten (Peer reviewed; Journal article, 2021)
      In this work, the Harten-Lax-van Leer Contact (HLLC) approximate Riemann solver is extended to two-phase flow through ducts with discontinuous cross-sections. Two main strategies are explored regarding the treatment of the ...
    • Investigation in scale effects on propellers with different magnitude of skew by CFD methods 

      Zhao, Yaning (Master thesis, 2015)
      Scale effects on the open-water performance of marine propellers are the problems to be investigated to the researchers and ship designers. Present thesis analyse the scale effects of marine propellers by CFD methods. ...
    • Isogeometric methods for CFD and FSI-simulation of flow around turbine blades 

      van Opstal, Timo Matteo; Fonn, Eivind; Holdahl, Runar; Kvamsdal, Trond; Kvarving, Arne Morten; Mathisen, Kjell Magne; Nordanger, Knut; Okstad, Knut Morten; Rasheed, Adil; Tabib, Mandar (Journal article; Peer reviewed, 2015)
      Coupled fluid-structure interaction simulations of wind turbines have traditionally been considered computationally too expensive to carry out. However, more powerful computers and better solution techniques based on ...
    • Particle segregation in turbulent Couette-Poiseuille flow with vanishing wall shear 

      Yang, Kun; Zhao, Lihao; Andersson, Helge Ingolf (Journal article, 2017)
      Inertial particles dispersed in wall-bounded flows in pipes and channels are known to accumulate close to the walls. The segregation ability depends greatly on the inertia-selection effects of the near-wall quasi-coherent ...
    • Scale effect on the wake field of a single screw ship 

      Ding, Yue (Master thesis, 2015)
      Nowdays, the CFD method has been become a famous approach that use to solve the problem involved the ship hydrodynamic problems. The objective of this master thesis is attempting to simulate a single screw stern ship ...
    • Sediment erosion in Francis turbines 

      Eltvik, Mette (Doktoravhandlinger ved NTNU, 1503-8181; 2013:250, Doctoral thesis, 2013)
      Sediment erosion is a major challenge for run-of-river power plants, especially during flood periods. Due to the high content of hard minerals such as quartz and feldspar carried in the river, substantial damage is observed ...
    • Wave induced effects on floaters of aquaculture plants 

      Kristiansen, David (Doctoral Theses at NTNU, 1503-8181; 2010:20, Doctoral thesis, 2010)
      The main objective of this work is to study wave loads on floaters of fish farms. Several incidents of major fish escapes due to structural collapse of fish farms in harsh weather have motivated this study, as a step towards ...
    • Wave induced effects on floaters of aquaculture plants 

      Kristiansen, David (Doctoral Theses at NTNU, 1503-8181; 2010:20, Doctoral thesis, 2010)
      The main objective of this work is to study wave loads on floaters of fish farms. Several incidents of major fish escapes due to structural collapse of fish farms in harsh weather have motivated this study, as a step towards ...