Now showing items 21-29 of 29

    • Numerical simulations of staged biomass grate fired combustion with an emphasis on NOx emissions 

      Bugge, Mette; Skreiberg, Øyvind; Haugen, Nils Erland L; Carlsson, Per; Houshfar, Ehsan; Løvås, Terese (Peer reviewed; Journal article, 2015)
      In the present paper NOx emissions from biomass combustion was studied, with the objective to demonstrate the applicability of stationary computational fluid dynamics simulations, including a detailed representation of the ...
    • Numerical Study of Hydrogen Inhibition of Char 

      Lazar, Joanna Maria (Master thesis, 2015)
      It has been known for a long time that hydrogen in the gas phase tend to inhibit gasification of char at low and intermediate temperatures. At higher temperatures, however, there are indications that hydrogen may speed up ...
    • Numerical Study of Hydrogen Inhibition of Char Gasification Using Detailed Hetero- and Homogeneous Chemical Kinetics 

      Lazar, Joanna; Haugen, Nils Erland L; Krüger, Jonas; Szlek, Andrzej (Journal article; Peer reviewed, 2016)
      It has been known for a long time that hydrogen in the gas phase tends to inhibit gasification of char at low and intermediate temperatures. At higher temperatures, however, there are indications that hydrogen may speed ...
    • Phase change materials for thermal energy storage in low- and high-temperature applications: a state-of-the-art 

      Sevault, Alexis; Kauko, Hanne; Bugge, Mette; Banasiak, Krzysztof; Haugen, Nils Erland L; Skreiberg, Øyvind (Research report, 2017)
    • Superchilling, ice fraction and quality 

      Stevik, Astrid; Haugen, Nils Erland L; Duun, Anne Sissel; Walnum, Harald Taxt; Nordtvedt, Tom Ståle (Chapter, 2010)
      The scope of the current experiments was to superchill a selection of fresh food by two superchilling methods followed by extensive storage studies and monitoring of quality during superchilled storage. Several methods for ...
    • The effect of Stefan flow on the drag coefficient of spherical particles in a gas flow 

      Jayawickrama, Thamali R.; Haugen, Nils Erland L; Bäbler, Matthâus Ulrich; Chishty, Muhammad Aqib; Umeki, Kentaro (Journal article; Peer reviewed, 2019)
      Particle laden flows with reactive particles are common in industrial applications. Chemical reactions inside the particle can generate a Stefan flow that affects heat, mass and momentum transfer between the particle and ...
    • The effect of turbulence on mass transfer rates between inertial polydisperse particles and fluid 

      Karchniwy, Ewa Malgorzata; Klimanek, Adam F.; Haugen, Nils Erland L (Journal article; Peer reviewed, 2019)
      The current work investigates how turbulence affects the mass transfer rate between inertial particles and fluid in a dilute, polydisperse particle system. Direct numerical simulations are performed in which all scales of ...
    • Turbophoresis in forced inhomogeneous turbulence 

      Mitra, Dhrubaditya; Haugen, Nils Erland L; Rogachevskii, Igor (Journal article; Peer reviewed, 2018)
      We show, by direct numerical simulations, that heavy inertial particles (characterized by Stokes number St) in inhomogeneously forced statistically stationary isothermal turbulent flows cluster at the minima of mean-square ...
    • Varying the forcing scale in low Prandtl number dynamos 

      Brandenburg, Axel; Haugen, Nils Erland L; Li, Xiang-Yu; Subramanian, Kandaswamy R. (Journal article; Peer reviewed, 2018)
      Small-scale dynamos are expected to operate in all astrophysical fluids that are turbulent and electrically conducting, for example the interstellar medium, stellar interiors, and accretion discs, where theymay also be ...