Blar i Institutt for energi og prosessteknikk på emneord "CFD"

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    • 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, ...

    • 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). ...

    • 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 ...

    • 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 ...

    • 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 ...