• Closure Law Model Uncertainty Quantification 

      Strand, Andreas; Kjølaas, Jørn; Bergstrøm, Trond Harald; Steinsland, Ingelin; Hellevik, Leif Rune (Peer reviewed; Journal article, 2021)
      The prediction uncertainty in simulators for industrial processes is due to uncertainties in the input variables and uncertainties in specification of the models, in particular the closure laws. In this work, the uncertainty ...
    • Repeatability in a multiphase pipe flow case study 

      Strand, Andreas; Brekken, Christian; Leinan, Paul Roger; Steinsland, Ingelin; Hellevik, Leif Rune (Peer reviewed; Journal article, 2021)
      A high degree of repeatability is most often an underlying assumption for research and development based on multiphase flow experiments. In this paper repeatability in multiphase flow experiments are studied through an ...
    • Uncertainty propagation through a point model for steady-state two-phase pipe flow 

      Strand, Andreas; Smith, Ivar Eskerud; Unander, Tor Erling; Steinsland, Ingelin; Hellevik, Leif Rune (Peer reviewed; Journal article, 2020)
      Uncertainty propagation is used to quantify the uncertainty in model predictions in the presence of uncertain input variables. In this study, we analyze a steady-state point-model for two-phase gas-liquid flow. We present ...
    • Uncertainty quantification and sensitivity analysis of material parameters in crystal plasticity finite element models 

      Khadyko, Mikhail; Sturdy, Jacob; Dumoulin, Stephane; Hellevik, Leif Rune; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2018)
      A number of studies have directly compared measurements of polycrystals’ deformation to the solution of a crystal plasticity model of the same polycrystal. An accurate representation of the full 3D microstructure and the ...