Now showing items 1-20 of 114

    • A Baseline model for monodisperse bubbly flows 

      Rzehak, Roland; Krepper, Eckhard; Ziegenhein, Thomas; Lucas, Dirk (SINTEF Proceedings;1, Chapter; Conference object, 2015)
      For practical applications the Euler-Euler two-fluid model relies on suitable closure relations describing interfacial exchange processes. The quest for models with a broad range of applicability allowing predictive ...
    • Adaptive coarse‐graining for large‐scale DEM simulations 

      Queteschiner, Daniel; Lichtenegger, Thomas; Schneiderbaer, Simon; Pirker, Stefan (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      The large time and length scales and, not least, the vast number of particles involved in industrial-scale simulations inflate the computational costs of the Discrete Element Method (DEM) excessively. Coarse grain models ...
    • A DNS study of droplet spreading and penetration on a porous medium 

      Das, S.; Milacic, E.; Patel, H.V.; Deen, N.G.; Kuipers, J.A.M. (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      We have investigated the dynamics of droplet spreading and liquid penetration at the surface of a porous medium at zero-gravity condition. A coupled IBM-VOF finite volume code has been used to perform pore-scale level fully ...
    • A Lagrangian‐Eulerian hybrid model for the simulation of direct reduction of iron ore in fluidized beds 

      Schneiderbauer, Simon; Kinaci, Mustafa E.; Hauzenberger, Franz; Pirker, Stefan (SINTEF Proceedings;2, Chapter; Conference object, 2017)
      Fluidized bed and moving bed reactors are one of the most important technologies in several branches of process industry. Especially, it is known since decades that iron can be reduced rapidly and efficiently from iron ...
    • A multi‐domain 1D particle‐reactor model for packed bed reactor applications 

      Tabib, Mandar; Cloete, Schalk; Morud, John; Lysberg, Magne; Amini, Shahriar (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      A validated multi-domain 1D particle-reactor model has been developed to simulate packed bed reactor operation. Two main components of the model are: (1) a particle model for simulating the radial distribution of chemical ...
    • A multifluid‐PBE model for a slurry bubble column with bubble size dependent velocity, weight fractions and temperature 

      Vik, Camilla Berge; Solsvik, Jannike; Engh, Mathias; Hillestad, Magne; Jakobsen, Hugo Atle (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      With kinetic gas theory as a starting point, equations of change for total mass, species mass, momentum and inner energy are developed for the dispersed gaseous phase and implemented to describe the Fischer-Tropsch synthesis ...
    • A multi-scale model for oxygen carrier selection and reactor design applied to packed bed chemical looping combustion 

      Tabib, Mandar; Morud, John; Johansen, Stein Tore; Amini, Shahriar (SINTEF Proceedings;1, Chapter; Conference object, 2015)
      Proper selection of a catalyst shape (or a particle shape) can improve the performance of a gas-solid packed bed reactor. The particle shape affects the packing structure and the transport phenomena within the packed bed. ...
    • An enhanced front tracking method featuring volume conservative remeshing and mass transfer 

      Roghair, Ivo; Van Sint Annaland, Martin; Kuipers, Hans (SINTEF Proceedings;1, Chapter; Conference object, 2015)
    • An Euler‐Euler model for gas‐liquid flows in a coil wound heat exchanger 

      Acher, Thomas; Knaup, Konrad; Zander, Hans-Jörg (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      Coil-wound heat exchangers (CWHE) are commonly adapted in process engineering for the efficient transfer of heat between fluids which feature wide temperature and pressure ranges. The field of application for this apparatus ...
    • A numerical approach to model aggregate restructuring in shear flow using DEM in Lattice‐Boltzmann simulations 

      Saxena, Akash; Kroll-Rabotin, Jean-Sebastien; Sanders, R.Sean (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      Aggregate shape and structure significantly impact rheological properties of fluids in many fields such as extractive metallurgy, oil field drilling and mineral processing. The morphology of the aggregates determines the ...
    • A numerical evaluation of the effect of the electro‐magnetic force on bubble flow in aluminium smelting process 

      Feng, Yuging; Witt, Peter J.; Zhao, Zhibin; Zhang, Kaiyu; Schwarz, M. Philip; Wang, Zhaowen (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      This paper aims to investigate the effect of electromagnetic forces on bubble flow under an anode using a computational fluid dynamics (CFD) model with the volume-of-fluid (VOF) method to capture the gas-liquid interface. ...
    • A six chemical species CFD model of alumina reduction in a Hall-Héroult cell 

      Witt, Peter J.; Feng, Yuqing; Snook, Graeme A.; Eick, Ingo; Cooksey, Mark (SINTEF Proceedings;1, Chapter; Conference object, 2015)
      The industrial process for producing primary aluminium metal is the reduction of powdered alumina in a Hall-Héroult reduction cell. These cells operate at temperatures above 940 °C with a highly corrosive electrolyte making ...
    • A Two‐Fluid model study of hydrogen production via water gas shift in fluidized bed membrane reactors 

      J.W. Voncken, Ramon; Roghair, Ivo; Van Sint Annaland, Martin (SINTEF Proceedings;2, Chapter; Conference object, 2017)
      Fluidized bed membrane reactors have been proposed as a promising reactor concept for the production of ultra-pure hydrogen via Water Gas Shift (WGS). High-flux thin-film dense palladium-based membranes are used to selectively ...
    • Bubble generated turbulence in two fluid simulation of bubbly flow 

      Schwarz, M. Philip; Feng, Yuqing; Witt, Peter J. (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      Bubbly flows are central to many processes in the minerals extraction and metal production industries, mainly because they enhance heat and mass transfer rates. These transfer rates depend on the turbulence level in the ...
    • CFD based study of dense medium drum separation processes 

      Eggers, Arne; Baelmans, Martine; Vanierschot, Maarten (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      Dense Medium Drum (DMD) separation is applied particularly in the coal and recycling industries. Characteristic of the process is a separation based on density, driven by the buoyancy and gravitational forces acting on an ...
    • CFD‐DEM modelling of blast furnace tapping 

      Vango, Mathias; Pirker, Stefan; Lichtenegger, Thomas (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      The campaign length of a blast furnace is limited by the hearth inner lining lifetime. In order to maximize the campaign length and ensure a good draining of hot metal and slag, a good understanding of the flow in the ...
    • CFD Erosion Modeling of Blind Tees 

      Sanchis, Arnaud; Skorgen, Alexander (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      In subsea components such as Production Trees (XT) where the production flow path is machined out of steel blocks, the flow changes direction abruptly at blind tees or sharp elbows, causing increased erosion risks compared ...
    • CFD modeling of a commercial‐size circle‐draft biomass gasifier 

      Liu, Hui; Cattolica, Robert J.; Seiser, Reinhard; Liao, Chang-hsien; Summers, Matthew (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)
      This work was focused on a commercial-size (2MWth.) circle-draft biomass gasifier. In this work a threedimensional transient CFD (computational fluid dynamics) model was established to simulate the circledraft biomass ...
    • CFD modeling of dynamic emulsion stability 

      Patil, A.V.; Johansen, S.T. (SINTEF Proceedings;2, Chapter; Conference object, 2017)
      Assuring transport and separation of oil and water crude emulsions is of significant importance to the oil and gas industries. The crude oil, due to its profuse chemical composition, has complex dispersion and emulsion ...
    • CFD modeling of oil-water separation efficiency in three-phase separators 

      Oshinowo, Lanre; Elsaadawy, Ehab; Vilagines, Regis (SINTEF Proceedings;1, Chapter; Conference object, 2015)
      Variations in oil properties or water content influence the rate of crude oil-water separation. This presents a challenge for separator operations when conditions change as fields mature, and for the design of new internals ...