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    • A fully nonlinear potential flow wave modelling procedure for simulations of offshore sea states with various wave breaking scenarios 

      Wang, Weizhi; Pakozdi, Csaba; Kamath, Arun; Bihs, Hans (Peer reviewed; Journal article, 2021)
      An accurate representation of a given sea state is crucial for the study of hydrodynamic loads on offshore structures. It is straightforward to check the quality of the reproduced regular waves in a numerical wave tank ...

    • Fully resolved strain field of the β’’ precipitate calculated by density functional theory 

      Frafjord, Jonas; Dumoulin, Stephane; Wenner, Sigurd; Ringdalen, Inga Gudem; Holmestad, Randi; Friis, Jesper (Peer reviewed; Journal article, 2020)
      The β′′ precipitate is the main hardening phase in age hardenable Al-Mg-Si alloys, and it is therefore of major scientific and industrial importance. A full model of the β′′ precipitate cross-section embedded in an aluminium ...

    • Fume Formation from Oxidation of Liquid SiMn Alloy 

      Ma, Yan; Kero, Ida; Tranell, Gabriella (Peer reviewed; Journal article, 2017)
      Thermally generated fumes from the production of manganese ferroalloys are mostly composed of metallic oxides generated due to reaction between high-temperature molten metal and ambient oxygen in the air. In the current ...

    • Fundamentals and physical principles for drilled cuttings transport – Cuttings bed sedimentation and erosion 

      Pedrosa, Camilo; Saasen, Arild; Ytrehus, Jan David (Peer reviewed; Journal article, 2021)
      The increasing necessity of challenging wellbore structures and drilling optimization for improved hole cuttings cleaning has been growing along time. As a result, operator companies have been researching and applying ...

    • Furnace Atmosphere and Dissolved Hydrogen in Aluminium 

      Syvertsen, Martin; Kvithyld, Anne; Gundersen, Eilif; Johansen, Inge; Engh, Thorvald Abel (The Minerals, Metals & Materials Series;2367-1181, Peer reviewed; Journal article, 2019)
      Hydrogen solubility is much higher in liquid than in solid aluminium. Therefore, if the hydrogen concentration in liquid aluminium is too high prior to solidification, there is high risk of gas porosity formation during ...

    • Future changes in consumption: The income effect on greenhouse gas emissions 

      Bjelle, Eivind Lekve; Wiebe, Kirsten Svenja; Többen, Johannes; Tisserant, Alexandre; Ivanova, Diana; Vita, Gibran; Wood, Richard (Peer reviewed; Journal article, 2021)
      The scale and patterns of household consumption are important determinants of environmental impacts. Whilst affluence has been shown to have a strong correlation with environmental impact, they do not necessarily grow at ...

    • The future of fuels: Uncertainty quantification study of mid-century ammonia and methanol production costs 

      Cloete, Schalk Willem Petrus; Arnaiz del Pozo, Carlos; Cloete, Jan Hendrik; Jiménez Álvaro, Ángel (Peer reviewed; Journal article, 2023)
      Fuels supplied 76% of global final energy consumption in 2021. Although ongoing electrification efforts can significantly reduce this dominant share, fuels will continue to play a leading role in the global energy system. ...

    • GaAs/AlGaAs Nanowire Array Solar Cell Grown on Si with Ultrahigh Power-per-Weight Ratio 

      Mukherjee, Anjan; Ren, Dingding; Vullum, Per Erik; Huh, Junghwan; Fimland, Bjørn-Ove; Weman, Helge (Peer reviewed; Journal article, 2021)
      Here we demonstrate a more effective use of III–V photoconversion material to achieve an ultrahigh power-per-weight ratio from a solar cell utilizing an axial p-i-n junction GaAs/AlGaAs nanowire (NW) array grown by molecular ...

    • Galvanic Deposition of Pt Nanoparticles on Black TiO2 Nanotubes for Hydrogen Evolving Cathodes 

      Touni, Aikaterini; Liu, Xin; Kang, Xiaolan; Almeida Carvalho, Patricia; Diplas, Spyridon; Both, Kevin Gregor; Sotiropoulos, Sotiris; Chatzitakis, Athanasios (Peer reviewed; Journal article, 2021)
      A galvanic deposition method for the in-situ formation of Pt nanoparticles (NPs) on top and inner surfaces of high-aspect-ratio black TiO2-nanotube electrodes (bTNTs) for true utilization of their total surface area has ...

    • GaN/AlGaN nanocolumn ultraviolet light-emitting diode using double-Layer graphene as substrate and transparent electrode 

      Høiaas, Ida Marie; Liudi Mulyo, Andreas; Vullum, Per Erik; Kim, Dong Chul; Ahtapodov, Lyubomir; Fimland, Bjørn-Ove; Kishino, Katsumi; Weman, Helge (Peer reviewed; Journal article, 2019)
      The many outstanding properties of graphene have impressed and intrigued scientists for the last few decades. Its transparency to light of all wavelengths combined with a low sheet resistance makes it a promising electrode ...

    • Gas electrodes with nickel based current collectors for molten carbonate electrolyte thermo-electrochemical cells 

      Kandhasamy, Sathiyaraj; Haarberg, Geir Martin; Kjelstrup, Signe; Solheim, Asbjørn (Peer reviewed; Journal article, 2019)
      Thermo-electrochemical cells with inexpensive molten carbonate electrolyte and (CO2|O2) gas electrodes allow the possible conversion of high temperature waste heat from industrial processes into electricity. The cell ...

    • Gas Flow and Pressure Drop in Charge Material in Silicon Production 

      Ringdalen, Eli; Einarsrud, Kristian Etienne; Nordhus, Astrid (Peer reviewed; Journal article, 2022)
      Gassing, outbursts of high-rate gas flows through the taphole, is a phenomenon that sometimes occurs during tapping of silicon furnaces. In addition to being an HSE challenge, this might also affect the tapping, while the ...

    • Gas switching reforming (GSR) for power generation with CO2 capture: Process efficiency improvement studies 

      Nazir, Shareq Mohd; Cloete, Jan Hendrik; Cloete, Schalk Willem Petrus; Amini, Shahriar (Peer reviewed; Journal article, 2019)
      This paper presents the process improvement studies of a combined cycle power plant integrated with a novel gas switching reforming (GSR) process for hydrogen production with integrated CO2 capture. The overall process is ...

    • Gas Switching Reforming (GSR) for syngas production with integrated CO2 capture using iron-based oxygen carriers 

      Zaabout, Abdelghafour; Dahl, Paul Inge; Ugwu, Ambrose; Tolchard, Julian R; Cloete, Schalk Willem Petrus; Amini, Shahriar (Peer reviewed; Journal article, 2019)
      The process behavior of a Gas Switching Reforming (GSR) reactor was studied using three different iron-based oxygen carrier materials: Iron-oxide on Alumina, Iron-Nickel oxide on Alumina and Iron-Ceria on Alumina. It was ...

    • Gas switching reforming for flexible power and hydrogen production to balance variable renewables 

      Szima, Szabolcs; Nazir, Shareq Mohd; Cloete, Schalk Willem Petrus; Amini, Shahriar; Fogarasi, Szabolcs; Cormos, Ana-Maria; Cormos, Calin-Cristian (Peer reviewed; Journal article, 2019)
      Variable renewable energy (VRE) is expected to play a major role in the decarbonization of the electricity sector. However, decarbonization via VRE requires a fleet of flexible dispatchable plants with low CO2 emissions ...

    • Gas Switching Reforming for syngas production with iron-based oxygen carrier-the performance under pressurized conditions 

      Ugwu, Ambrose; Zaabout, Abdelghafour; Tolchard, Julian R; Dahl, Paul Inge; Amini, Shahriar (Peer reviewed; Journal article, 2019)
      A four-stage Gas Switching Reforming for syngas production with integrated CO2 capture using an iron-based oxygen carrier was investigated in this study. The oxygen carrier was first reduced using dry methane, where high ...

    • Gas switching technology: Economic attractiveness for chemical looping applications and scale up experience to 50 kWth 

      Ugwu, Ambrose; Arnaiz del Pozo, Carlos; Zaabout, Abdelghafour; Nazir, Shareq Mohd; Kalendar, Nimet Uzun; Cloete, Schalk Willem Petrus; Szima, Szabolcs; Fogarasi, Szabolcs; Donat, Felix; van Diest, Geert; Cloete, Jan Hendrik; Jiménez Álvaro, Ángel; Albertsen, Knuth; Cormos, Ana-Maria; Cormos, Calin-Cristian; Amini, Shahriar (Peer reviewed; Journal article, 2022)
      Gas switching technology (GST) was introduced to facilitate operation and scale-up of pressurized chemical looping-based technologies thus bringing the expected benefits of reducing costs and energy penalty of CO2 capture. ...

    • Gaseous reduction of Mn ores in CO-CO2 atmosphere 

      Larssen, Trine Asklund; Tangstad, Merete; Kero, Ida (The Minerals, Metals & Materials Series;2367-1181, Chapter, 2018)
      The efficiency in production of manganese ferroalloys is dependent on the gaseous reduction of the higher manganese oxides in the ores used as raw materials. The materials, descending in the furnace, will meet the furnace ...

    • Gassing During Tapping of Silicon 

      Vachaparambil, Kurian J.; Panjwani, Balram; Olsen, Jan Erik (Peer reviewed; Journal article, 2022)
      During tapping of metal from silicon furnaces, a significant amount of gas is often released through the tap-hole. The gas is combustible, and a flame jet is created which poses a safety threat to operators. Due to the ...

    • The generality of the standard 2D TFM approach in predicting bubbling fluidized bed hydrodynamics 

      Cloete, Schalk Willem Petrus; Zaabout, Abdelghafour; Johansen, Stein Tore; Annaland, MV; Gallucci, F; Amini, Shahriar (Peer reviewed; Journal article, 2013)
      Hydrodynamic simulations of a pseudo-2D bubbling fluidized bed were carried out and compared to experiments conducted over a wide range of flow conditions. The primary purpose of this study was to assess the generality of ...