• A CFD STUDY ON THE IMPACT OF BARRIERS AND NONUNIFORMITIES ON FURNACE TAPPING 

      Olsen, Jan Erik (SINTEF Proceedings;6, Chapter; Peer reviewed, 2020)
      Tapping of slag and metal from metal producing furnaces are often inconsistent and it is difficult to predict the outcome of the process. Nonuniformities in the particle bed has been hypothesized as reasons for inconsistent ...
    • Cleaning of polycyclic aromatic hydrocarbons (PAH) obtained from ferroalloys plant 

      Panjwani, Balram; Andersson, Stefan; Wittgens, Bernd; Olsen, Jan Erik (Chapter, 2017)
      Polycyclic Aromatic hydrocarbons (PAHs) are organic compounds consisting of only hydrogen and aromatic carbon rings. PAHs are neutral, non-polar molecules that are produced due to incomplete combustion of organic matter. ...
    • Cleaning of polycyclic aromatic hydrocarbons (PAH) obtained from ferroalloys plant 

      Panjwani, Balram; Andersson, Stefan; Wittgens, Bernd; Olsen, Jan Erik (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      Polycyclic Aromatic hydrocarbons (PAHs) are organic compounds consisting of only hydrogen and aromatic carbon rings. PAHs are neutral, non-polar molecules that are produced due to incomplete combustion of organic matter. ...
    • Combustion chamber scaling for energy recovery from furnace process gas: waste to value 

      Panjwani, Balram; Wittgens, Bernd; Olsen, Jan Erik (SINTEF proceedings;2387-4295, Chapter; Peer reviewed, 2017)
      The dense discrete phase model (DDPM) is a promising method for detailed simulation of fluidized bed reactors. It can resolve particle clusters on much coarser grids than the conventional two fluid model (TFM) and allows ...
    • Comparison of Meso Scale Subsea gas Release With Multiphase Eulerian-Lagrangian CFD Model 

      Skjetne, Paal; Olsen, Jan Erik; Davies, Emlyn John; Leirvik, Frode; Krause, Daniel Franklin; Eidnes, Grim (Chapter, 2017-05-25)
      We compare the observed dynamics of subsea starting plumes with multiphase computational fluid dynamics (CFD) simulations. In the event of subsea loss of containment of either natural gas or carbon dioxide it is important ...
    • Governing physics of shallow and deep subsea gas release 

      Olsen, Jan Erik; Skjetne, Paal (SINTEF Proceedings;1, Chapter; Conference object; Peer reviewed, 2015)
      A modelling concept for studying the resulting bubble plume from a subsea gas release is presented. Simulation results show good consistency with available experimental data. The modelling concept is applied to assess the ...
    • Mass transfer between bubbles and seawater 

      Olsen, Jan Erik; Dunnebier, Dorien; Davies, Emlyn John; Skjetne, Paal; Morud, John (Peer reviewed; Journal article, 2017)
      Mass transfer between bubbles and seawater is an important mechanism when determining how much gas reaches the atmosphere from gas sources at the seabed. The mass transfer coefficient is a governing parameter for the ...
    • Mathematical Modeling of Furnace Drainage While Tapping Slag and Metal Through a Single Tap-Hole 

      Olsen, Jan Erik; Reynolds, Quinn Gareth (Peer reviewed; Journal article, 2020)
      Furnace tapping is a critical operation on pyrometallurgical furnaces known for unpredictable performance in many cases. A reduced order mathematical model capable of predicting tapping rates of both slag and metal is ...
    • Modelling of the Ferrosilicon furnace: effect of boundary conditions and burst 

      Panjwani, Balram; Olsen, Jan Erik; Wittgens, Bernd (SINTEF Proceedings;1, Chapter; Conference object; Peer reviewed, 2015)
      A by-product from the ferrosilicon process is process gas which escapes into the furnace hood were it reacts with air. The process gas mainly consists of CO with some SiO and moisture. Modeling the gas behavior inside the ...
    • A multiscale numerical approach of the dripping slag in the coke bed zone of a pilot scale Si-Mn furnace 

      Letout, Sebastien Romain; Ratvik, Arne Petter; Tangstad, Merete; Johansen, Stein Tore; Olsen, Jan Erik (SINTEF proceedings;2387-4295, Chapter, 2017)
      The Si-Mn alloy process production in submerged arc furnaces (SAF) is investigated. The aim of the studies currently in progress is an enhancement of the knowledge about the key reactions and the mass transport phenomenon ...
    • Observations of rising methane bubbles in Trondheimsfjord and its implications to gas dissolution 

      Olsen, Jan Erik; Krause, Daniel Franklin; Davies, Emlyn John; Skjetne, Paal (Journal article; Peer reviewed, 2019-02-13)
      Gas dissolution reduces the release of methane to the atmosphere from subsea sources. Being able to predict and assess the methane flux to the atmosphere requires knowledge on gas dissolution and mass transfer. This can ...
    • Observations of rising methane bubbles in Trondheimsfjord and its implications to gas dissolution 

      Olsen, Jan Erik; Krause, Daniel Franklin; Davies, Emlyn John; Skjetne, Paal (Journal article; Peer reviewed, 2019-03-01)
      Gas dissolution reduces the release of methane to the atmosphere from subsea sources. Being able to predict and assess the methane flux to the atmosphere requires knowledge on gas dissolution and mass transfer. This can ...
    • ON THE SURFACING MECHANISM OF BUBBLE PLUMES FROM SUBSEA GAS RELEASE 

      Olsen, Jan Erik; Skjetne, Paal (Chapter, 2017)
      A subsea release of gas poses a risk to humans and assets at the surface. Assessing this risk requires knowledge on how much gas reaches the surface and how it is distributed at the surface. This can be estimated by various ...
    • Phase effects in tap-hole flow-a computational modelling study 

      Reynolds, Quinn; Olsen, Jan Erik; Erwee, Markus; Oxtoby, Oliver (Peer reviewed; Journal article, 2019)
      The extraction of molten products and wastes through smelting furnace tap-holes during the tapping process is a complex procedure involving many coupled thermophysical effects. Insight into the fluid flow behaviour in such ...
    • Progress in Applied CFD – CFD2017. Selected papers from 10th International Conference on Computational Fluid Dynamics in the Oil & Gas, Metallurgical and Process Industries 

      Johansen, Stein Tore; Olsen, Jan Erik (SINTEF Proceedings;2, Book; Peer reviewed; Conference object, 2017)
      Preface. This book contains all manuscripts approved by the reviewers and the organizing committee of the 12th International Conference on Computational Fluid Dynamics in the Oil & Gas, Metallurgical and Process Industries. ...
    • 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 ...
    • Summarizing an Eulerian–Lagrangian model for subsea gas release and comparing release of CO2 with CH4 

      Olsen, Jan Erik; Skjetne, Paal (Peer reviewed; Journal article, 2020)
      A subsea gas release is a concern for both safety and environment. This can be assessed by mathematical models. The development of an Eulerian–Lagrangian modelling concept to study subsea gas release has taken place over ...
    • VLES turbulence model for an Eulerian–Lagrangian modeling concept for bubble plumes 

      Olsen, Jan Erik; Skjetne, Paal; Johansen, Stein Tore (Peer reviewed; Journal article, 2017)
      Traditional Reynolds-averaged Navier–Stokes (RANS) approaches to turbulence modeling, such as the k-ϵ model, have some well-known shortcomings when modeling transient flow phenomena. To mitigate this, a filtered URANS model ...