Recent Submissions

  • Equilibrium Measurements of the NH3-CO2-H2O System: Speciation Based on Raman Spectroscopy and Multivariate Modeling 

    Halstensen, Maths; Jilvero, Henrik; Jinadasa, Wathsala; Jens, Klaus-Joachim (Journal article; Peer reviewed, 2017)
    Liquid speciation is important for reliable process design and optimization of gas-liquid absorption process. Liquid-phase speciation methods are currently available, although they involve tedious and time-consuming ...
  • Algorithm with improved accuracy for real-time measurement of flow rate in open channel systems 

    Agu, Cornelius Emeka; Hjulstad, Åsmund; Elseth, Geir; Lie, Bernt (Journal article; Peer reviewed, 2017)
    Most methods for flow rate measurement in open channels usually have low accuracy over a range of flow rates due to varying fluid properties, flow conditions and channel length. This paper suggests an algorithm to improve ...
  • High rate manure supernatant digestion 

    Bergland, Wenche Hennie; Dinamarca, Carlos; Torabzadegan, Mehrdad; Nordgård, Anna Synnøve Røstad; Bakke, Ingrid; Bakke, Rune (Journal article; Peer reviewed, 2015)
    The study shows that high rate anaerobic digestion may be an efficient way to obtain sustainable energy recovery from slurries such as pig manure. High process capacity and robustness to 5 % daily load increases are observed ...
  • Waste heat availability in the raw meal department of a cement plant 

    Amarasinghe, Widuramini Sameendranath; Husum, Ida; Tokheim, Lars Andre (Journal article; Peer reviewed, 2017)
  • Simulation of Oil Production from Homogenous North Sea Reservoirs with Inflow Control using OLGA/Rocx 

    Sund, Sveinung M.; Iversen, Thomas Berg; Hansen, Magnus S.; Bohlin, Jørgen; Vøllestad, Ole Kristian; Furuvik, Nora Cecilie Ivarsdatter; Halvorsen, Britt Margrethe (Journal article; Peer reviewed, 2017)
    Advances in drilling technology have made long, horizontal wells the preferred method to extract oil from reservoirs in the Norwegian Sector. Early water or gas breakthrough is a passive inflow control devices (ICD) are ...
  • Modeling and simulation of light oil production using inflow control devices 

    Timsina, Ramesh; Furuvik, Nora Cecilie Ivarsdatter; Moldestad, Britt M.E (Journal article; Peer reviewed, 2017)
    Light crude oil production is the most economical and is currently serving as benchmark together with medium crude oil. The most of the conventional oil fields in the worlds are either light or medium crude oil. Conventional ...
  • Detonation propagation in stratified reactant layers 

    Gaathaug, Andre Vagner; Bjerketvedt, Dag; Lundberg, Joachim; Vågsæther, Knut (Journal article; Peer reviewed, 2017)
    A numerical investigation of detonation propagation in stratified reactant layers is presented in this paper. It is baesed on the reactive Euler equations using a two step chemical kinetics approach. The numerical simulations ...
  • Open Active Contour Model For Front Tracking Of Detonation Waves 

    Maharjan, Samee; Lysaker, Ola Marius; Gaathaug, Andre Vagner (Journal article; Peer reviewed, 2017)
    This paper presents an image processing framework for tracking the front of the detonation wave from a sequence of images. The images are captured by high speed camera during a laboratory gas explosion experiment. By ...
  • CFD Study of Particle Flow Patterns in a Rotating Cylinder Applying OpenFOAM and Fluent 

    Dissanayake, Susantha Chandana; Karunarathne, Sumudu; Lundberg, Joachim; Tokheim, Lars Andre (Journal article; Peer reviewed, 2017)
    A rotating cylinder (RC) is a common type of reactor used in the industry, the most typical example being a cement kiln. The particle flow pattern inside such a unit is necessary for the mass and energy transfer, and this ...
  • Comparison of the influence of drag models in CFD simulation of particle mixing and segregation in a rotating cylinder 

    Karunarathne, Sumudu; Tokheim, Lars Andre (Journal article; Peer reviewed, 2017)
    CFD modelling was used to simulate particle segregation in a transverse plane of a rotating cylinder under different particle-particle drag models. The Eulerian method was used to model the dense particulate phases in the ...
  • Model uncertainty of interfacial area and mass transfer coefficients in absorption column packings 

    Karunarathne, Sumudu; Eimer, Dag Arne; Øi, Lars Erik (Journal article; Peer reviewed, 2017)
    Uncertainty in model input parameters propagates through the model to make model output imprecision. Here, mathematical models used to calculate interfacial area and mass transfer coefficient for both random and structured ...
  • Simulation of burning velocities in gases vented from thermal run-a-way lithium ion batteries 

    Johnsplass, Jonathan; Henriksen, Mathias; Vågsæther, Knut; Lundberg, Joachim; Bjerketvedt, Dag (Journal article; Peer reviewed, 2017)
    This paper describes the results from simulations of laminar burning velocities in the premixed air and flammable gases vented from abused Li-ion batteries. The released mixture from such batteries contain mixtures of ...
  • Using Image Processing for Flame Diagnostics 

    Lundberg, Joachim; Henriksen, Mathias; Gaathaug, Andre Vagner (Journal article; Peer reviewed, 2017)
    An image processing routine was developed to determine the flame height of a hydrogen jet flame. Two different techniques was tested, where one where based on Wiens distribution of a black body and one based on intensity ...
  • Low temperature methanol synthesis catalyzed by copper nanoparticles 

    Ahoba-Sam, Christian; Olsbye, Unni; Jens, Klaus-Joachim (Journal article; Peer reviewed, 2017)
    A one pot catalytic system which involves Cu and an alkoxide co-catalyst has been used for methanol (MeOH) synthesis at low temperature. Up to about 92% syngas conversion per pass and more than 90% selectivity to MeOH ...
  • Performance of MAPA promoted tertiary amine systems for CO2 absorption: Influence of alkyl chain length and hydroxyl groups 

    Bernhardsen, Ida Mortensen; Krokvik, Iris Renate Tøkje; Jens, Klaus-Joachim; Knuutila, Hanna K (Journal article; Peer reviewed, 2017)
    Absorption and desorption of CO2 into five aqueous tertiary amine solvents and their blends with MAPA were studied using a screening apparatus. Results showed that MAPA significantly enhanced both CO2 absorption rate and ...
  • Particle image velocimetry measurements of stratified gas-liquid flow in horizontal and inclined pipes 

    Vestøl, Sondre; Kumara, W.A.S.; Melaaen, Morten Christian (Journal article; Peer reviewed, 2018)
    The main objectives of this work is to produce detailed velocity profile measurements over a range of operating conditions of two phase gas/liquid flow with low liquid fractions in horizontal and inclined pipes. The ...
  • Gamma densitometry measurements of gas/liquid flow with low liquid fractions in horizontal and inclined pipes 

    Vestøl, Sondre; Kumara, W.A.S.; Melaaen, Morten Christian (Journal article; Peer reviewed, 2018)
    The ability to accurately predict the volume fraction of different phases flowing in a pipe is of extreme importance to nuclear and oil industries, among others. This article will focus on the application of a single-beam ...
  • CO2 Capture by Aqueous 3-(Methylamino)propylamine in Blend with Tertiary Amines: An NMR Analysis 

    Perinu, Cristina; Bernhardsen, Ida Mortensen; Svendsen, Hallvard Fjøsne; Jens, Klaus-Joachim (Journal article; Peer reviewed, 2017)
    Aqueous 3-(Methylamino) propylamine (MAPA) in blend with 2-(Diethylamino) ethanol (DEEA) and other tertiary amines, which mainly differ from DEEA in the number of hydroxyl functions (-OH) and/or in the length and structure ...
  • Distribution Of Co2 In Fractured Carbonate Reservoirs 

    Furuvik, Nora Cecilie Ivarsdatter; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2017)
    Deep geologic injection of supercritical carbon dioxide (CO 2 ) for enhanced oil recovery (EOR) has been widely used for improved oil recovery from depleted oilfields since early 1970s. The CO 2 injec - tion maintains the ...
  • Stepwise Analysis Of Gasification Reactions With Aspen Plus And Cpfd 

    Eikeland, Marianne Sørflaten; Thapa, Rajan Kumar (Journal article; Peer reviewed, 2017)
    The energy from biomass can be utilized through the thermochemical conversion processes of pyrolysis and gasification. Biomass such as wood chips is heated in a gasification reactor to produce a synthesis gas containing ...

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