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Gudrun Saevarsdottir
Reykjavík University
ElectrodeInorganic chemistryChemistryElectric arc furnaceAluminium
34Publications
6H-index
134Citations
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Publications 42
Newest
#1Vijay Chauhan (RU: Reykjavík University)
#2Maria S. Gudjonsdottir (RU: Reykjavík University)H-Index: 2
Last. Gudrun Saevarsdottir (RU: Reykjavík University)H-Index: 6
view all 3 authors...
Abstract The work presents computational modeling and an experimental investigation of silica deposition occurring in geothermal systems with superheated steam flows. An advection diffusion model was implemented for predicting silica particle transport and deposition in turbulent flows. The model includes the effect of Brownian diffusion, turbulent diffusion, turbophoresis, Saffman lift force, and drag force on particle motion. Simulation results for deposition of silica particles in superheated...
Source
#1Yonatan A. Tesfahunegn (RU: Reykjavík University)H-Index: 7
#2Thordur MagnussonH-Index: 1
Last. Gudrun Saevarsdottir (RU: Reykjavík University)H-Index: 6
view all 4 authors...
This work discusses 3D models of current distribution in a three-phase submerged arc furnace that contains several components, such as electrodes, central arcs, craters, crater walls, and side arcs that connect electrodes and crater walls. A complete modeling approach requires time-dependent modeling of the AC electromagnetic fields and current distribution, while an approximation using a static DC approach enables a significant reduction in computational time. By comparing results for current a...
Source
#1Omar AwayssaH-Index: 1
#2Rauan MeirbekovaH-Index: 2
Last. Geir Martin HaarbergH-Index: 19
view all 5 authors...
1 CitationsSource
#1Rauan MeirbekovaH-Index: 2
Last. Gudrun SaevarsdottirH-Index: 6
view all 4 authors...
Source
#2Halvor KvandeH-Index: 9
Last. Barry J. WelchH-Index: 15
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Source
#1Gudrun Saevarsdottir (RU: Reykjavík University)H-Index: 6
#2Halvor Kvande (NTNU: Norwegian University of Science and Technology)H-Index: 9
Last. Barry J. Welch (UNSW: University of New South Wales)H-Index: 15
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This paper addresses the global challenge of greenhouse gas emissions facing the aluminum industry. The demand, production and use of aluminum are increasing and so are the emissions. From bauxite mine to aluminum ingot, the total global average emissions vary somewhat in the literature, but most reported values are now between 12 and 17 metric tonnes of CO2-equivalents per tonne of aluminum, depending on the various estimates and assumptions made. Two-thirds of these gases are emitted because t...
1 CitationsSource
#2Thordur MagnussonH-Index: 1
Last. Gudrun SaevarsdottirH-Index: 6
view all 4 authors...
Source
#1Vijay Chauhan (RU: Reykjavík University)
#2Maria S. Gudjonsdottir (RU: Reykjavík University)H-Index: 2
Last. Gudrun Saevarsdottir (RU: Reykjavík University)H-Index: 6
view all 3 authors...
The paper describes a computational study and an experimental investigation of aqueous potassium carbonate droplets in superheated steam flow for potential applications in mitigation of superheated geothermal steam. The computational model included the boiling point elevation due to the droplet salt concentration as well as other concentration-dependent physical properties of the salt solution. Various phenomena involved in the process, such as breakup, transport, heat transfer, boiling and coup...
Source
#1Vijay Chauhan (RU: Reykjavík University)
#2Maria S. Gudjonsdottir (RU: Reykjavík University)H-Index: 2
Last. Gudrun Saevarsdottir (RU: Reykjavík University)H-Index: 6
view all 3 authors...
Abstract A study on scrubbing of superheated steam containing silica impurities is performed using an aqueous potassium carbonate solution as a potential application in mitigation of superheated geothermal steam. An experimental setup aimed at testing a silica particle scrubbing technique was built. The setup consists of a superheated steam generating system, a silica particle feeding and an injection system, a salt solution injection and separation system, and a sampling unit. Silica particle c...
Source
#1Yonatan A. Tesfahunegn (RU: Reykjavík University)H-Index: 7
#2Thordur MagnussonH-Index: 1
Last. Gudrun Saevarsdottir (RU: Reykjavík University)H-Index: 6
view all 4 authors...
Most submerged arc furnaces used for the production of ferroalloys run on three-phase alternating current. This affects the electrical operation of the furnace and thus it is of interest to study alternating current distributions in the system. This work presents computations of alternating electric current distributions inside an industrial submerged arc furnace for silicon production. A 3D model has been developed in ANSYS Maxwell using the eddy current solver. In each phase, electrode, centra...
1 CitationsSource
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