Browsing by Author "Åkervik, Espen"

Now showing items 1-9 of 9

    • Aerosol transport in idealized wind-wave systems 

      Åkervik, Espen (2022-12-22)
      This report deals with aerosol transport in turbulent wind over water waves. For simple terrain onshore, there appears to be consensus that aerosol transport is well described by simple models. However, for complex terrain ...

    • A Comprehensive Simulation Methodology for Fluid-Structure Interaction of Offshore Wind Turbines 

      Rasheed, Adil; Holdahl, Runar; Kvamsdal, Trond; Åkervik, Espen (2014)
      This paper gives an overview of a comprehensive simulation methodology for fluid-structure interaction (FSI) of offshore wind turbines that is being developed at the Applied Mathematics Department of SINTEF ICT. The ...

    • Efficacy of face masks as source control and respiratory protection against transmission of SARS-CoV-2 

      Dybwad, Marius; Fykse, Else Marie; Gjesdal, Thor; Gorzkowska-Sobas, Agnieszka Anna; Helgeland, Anders; Åkervik, Espen (2021-06-25)
      During the COVID-19 pandemic, medical and community face masks have been used extensively by health care workers and the general public to reduce transmission of the SARSCoV-2 virus. This report reviews the available ...

    • Large-eddy simulation of dense gas dispersion over a simplified urban area 

      Wingstedt, Emma My Maria; Osnes, Andreas Nygård; Åkervik, Espen; Eriksson, Daniel; Reif, Bjørn Anders Pettersson (2017)
      Dispersion of neutral and dense gas over a simplified urban area, comprising four cubes, has been investigated by the means of large-eddy simulations (LES). The results have been compared to wind tunnel experiments and ...

    • Literature review of atmospheric contaminant transport offshore 

      Åkervik, Espen; Gjedal, Thor (2023-11-17)
      In this report, we consider the atmospheric dispersion of possibly harmful contaminants from offshore accidents by doing a literature review on the subject. The atmospheric dispersion is mainly governed by the wind, which ...

    • Luftbåren smitte av virale luftveisinfeksjoner fra et aerosolfysisk perspektiv 

      Åkervik, Espen; Fossum, Hannibal E.; Dybwad, Marius; Helgeland, Anders (2020-06-16)
      Luftbåren smitte foregår gjennom at infeksiøst materiale følger med dråper av ulik størrelse ut fra verten gjennom respiratoriske aktiviteter som pust, tale, sang, host eller nys. For de vanlige aktivitetene som pusting, ...

    • Measurements of hydrocarbon flame propagation in a channel 

      Åkervik, Espen; Fossum, Hannibal E.; Henriksen, Mathias; Bjerketvedt, Dag (2021-05-25)
      Assessing the risk of gas explosions associated with Li-ion batteries in confined geometries is challenging. When a Li-ion battery cell undergoes so-called thermal runaway, internal reactions in the cell can lead to the ...

    • Numerical simulation of hydrogen dispersion in an open-ended rectangular channel 

      Fossum, Hannibal Eie; Åkervik, Espen; Henriksen, Mathias; Bjerketvedt, Dag (2024-11-26)
      In this work, large-eddy simulations of hydrogen dispersion from turbulent subsonic hydrogen-gas emissions in a 5.8 × 0.9 × 0.8 m open-ended channel are described. Such numerical modeling of hydrogen-related processes ...

    • An operational dispersion model for wind over swell seas 

      Åkervik, Espen; Osnes, Andreas Nygård (2024-07-04)
      In this report, we develop an operational contaminant transport model suitable for offshore conditions. Although the model is, in principle, independent of sea state, we expect it to be most useful for swell sea calculations, ...