Now showing items 21-34 of 34

    • New Insights into Computational Fluid Dynamic Modeling of the Resistivity and Overpotential in Reverse Electrodialysis 

      Jalili, Zohreh; Burheim, Odne Stokke; Einarsrud, Kristian Etienne (Journal article; Peer reviewed, 2018)
      The resulting electrical potential of a reverse electrodialysis is reduced both due to ohmic and non-ohmic resistances. The non-ohmic resistance is mainly controlled by concentration polarization which is a considerable ...
    • Numerical simulation of bubble growth in a supersaturated solution 

      Vachaparambil, Kurian J.; Einarsrud, Kristian Etienne (Journal article; Peer reviewed, 2020)
      In this paper, a Volume of Fluid (VOF) based approach to simulate the growth of a pre-existing bubble in a supersaturated solution is developed and implemented in OpenFOAMⓇ. The model incorporates the Compressive Continuous ...
    • On modelling electrochemical gas evolution using the volume of fluid method 

      Vachaparambil, Kurian J.; Einarsrud, Kristian Etienne (Chapter, 2020)
      In this work we describe the various building block relevant in simulating electrochemical gas evolution using Volume of Fluid (VOF) method. These building blocks are implemented in the VOF solver available in OpenFOAM® ...
    • On sharp surface force model: effect of sharpening coefficient 

      Vachaparambil, Kurian J.; Einarsrud, Kristian Etienne (Journal article, 2020)
      Amongst the multitude of approaches available in literature to reduce spurious velocities in Volume of Fluid approach, the Sharp Surface Force (SSF) model is increasingly being used due to its relative ease to implement. ...
    • An Overall Furnace Model for the Silicomanganese Process 

      Sparta, Manuel; Risinggård, Vetle Kjær; Einarsrud, Kristian Etienne; Halvorsen, Svenn Anton (Journal article; Peer reviewed, 2021)
      An overall model for a pilot-scale silicomanganese furnace that simultaneously considers electrical and thermal conditions, process chemistry, and flow of solid and liquid substances.
    • Pragmatic CFD-modeling of alumina feeding 

      Renkel, Maria Felicitas (Master thesis, 2020)
      Hensikten med denne oppgaven var å videreutvikle en kode for beregning av bevaringsligningene over en industriell elektrolysecelle for å forutsi termiske effekter på cellen så raskt som mulig. Målet er å få koden til å ...
    • A Review of Ferroalloy Tapping Models 

      Bublik, Sergey; Olsen, Jan Erik; Loomba, Varun; Reynolds, Quinn Gareth; Einarsrud, Kristian Etienne (Peer reviewed; Journal article, 2021)
      Tapping is an important furnace operation in the ferroalloy industry and poses a number of complex and coupled challenges of both practical and economical importance. Owing to the hazardous high-temperature conditions ...
    • Shape Factor Effect on Inclusion Sedimentation in Aluminum Melts 

      Gökelma, Mertol; Einarsrud, Kristian Etienne; Tranell, Gabriella; Friedrich, Bernd (Journal article; Peer reviewed, 2020)
      The quality requirements of aluminum products are steadily increasing, and the presence of non-metallic inclusions have a large impact on the quality of aluminum products. Sedimentation is a widely applied technique to ...
    • Slag-metal interactions in the FeMn tapping process: Interfacial properties and wetting 

      Bublik, Sergey; Bao, Sarina; Tangstad, Merete; Einarsrud, Kristian Etienne (Chapter, 2019)
      FeMn-alloys are produced by transforming ore and carbon materials into FeMn and slag at high temperatures in a furnace. Entrainment of FeMn in slag during tapping reduces the yield. Entrainment and subsequent separation ...
    • Temperature and Velocity Effects on Mass and Momentum Transport in Spacer-Filled Channels for Reverse Electrodialysis: A Numerical Study 

      Jalili, Zohreh; Pharoah, Jon; Burheim, Odne Stokke; Einarsrud, Kristian Etienne (Journal article; Peer reviewed, 2018)
      Concentration polarization is one of the main challenges of membrane-based processes such as power generation by reverse electrodialysis. Spacers in the compartments can enhance mass transfer by reducing concentration ...
    • The micro- and macrostructure of alumina rafts 

      Gylver, Sindre Engzelius; Nina Helene, Omdahl; Rørvik, Stein; Hansen, Ingrid; Nautnes, Andrea; Neverdal, Sofie Nilssen; Einarsrud, Kristian Etienne (Journal article; Peer reviewed, 2019)
      As alumina particles are fed to aluminium reduction cells, a frozen layer of bath is typically formed on the particle surface, due to the relatively low bath superheat. For particles in close proximity, platelets with ...
    • Towards a coupled multi-scale, multi-physics simulation framework for aluminium electrolysis 

      Einarsrud, Kristian Etienne; Eick, Ingo; Bai, Wei; Feng, Yuqing; Hua, Jinsong; Witt, Peter J. (Journal article, 2017)
      Aluminium metal production through electrolytic reduction of alumina in a cryolite bath is a complex, multi-physics, multi-scale process, including magneto-hydrodynamics (MHD), bubble flow, thermal convection, melting and ...
    • Using Surplus Heat to Pre-Heat Carbon Anodes for Aluminium Electrolysis 

      Grimstad, Martin (Master thesis, 2019)
      Karbon anoder brukes opp i Hall-Héroult prosessen og må erstattes regelmessig. Når en ny anode blir plassert i aluminiumsovnen, vil badet umiddelbart fryse på undersiden av anoden og danne et fryst isolerende lag. Denne ...
    • Utilization of waste heat for pre-heating of anodes 

      Einarsrud, Kristian Etienne; Grimstad, Martin; Elstad, Kim Ronny; Solheim, Asbjørn (Peer reviewed; Journal article, 2020)
      Carbon anodes are replaced on a regular basis in Hall–Héroult cells as they are consumed by electrochemical reactions. Upon insertion of new anodes, bath will freeze locally as a result of low bath superheat and comparatively ...