Blar i USN Open Archive på forfatter "Halvorsen, Britt"
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A comparative study between electrical capacitance tomography and time-resolved X-ray tomography
Rautenbach, Christo; Mudde, Robert F.; Yang, X.; Melaaen, Morten Christian; Halvorsen, Britt (Journal article; Peer reviewed, 2013)Modern day tomographs enable the research community to investigate the internal flow behaviour of a fluidized bed by non invasive methods that partially overcome the opaque nature of a dense bubbling bed. Each tomographic ... -
A Study of the Effect of Relative Permeability and Residual Oil Saturation on Oil Recovery
Ediriweera, Mahesh Priyankara; Halvorsen, Britt (Journal article; Peer reviewed, 2015-11-25)The depletion of oil production and the low recovery rate are the major challenges faced in oil production. Several studies have shown that considerable amount of oil still remains in the reservoir after the well shutdown. ... -
An experimental and computational study of flow behaviour in bubbling fluidized beds
Halvorsen, Britt (Doctoral theses at NTNU;2005:70, Doctoral thesis; Peer reviewed, 2005)Experimental and computational studies of bubble behaviour in gas/solid fluidized beds have been performed. Bubble behaviour depends on particle density, particle size and size distribution and emphasis is given to study ... -
Aspen Plus Simulation of Biomass Gasification with known Reaction Kinetic
Eikeland, Marianne Sørflaten; Thapa, Rajan Kumar; Halvorsen, Britt (Conference object; Peer reviewed, 2015-11-25)The energy from biomass can be utilized through the thermochemical conversion processes of pyrolysis and gasification. The Aspen Plus simulation tool is applicable for simulation of the gasification processes. The most ... -
Computational study of fingering phenomenon in heavy oil reservoir with water drive
Wijeratne, D. I. Erandi N.; Halvorsen, Britt (Journal article, 2015)The objective of this paper is to numerically study the flow in heavy oil reservoir with water drive. The main focus is to investigate the viscous fingering phenomenon and how it affects the oil recovery. Two-dimensional ... -
Computational Study of Heavy Oil Production with Inflow Control Devices
Wijeratne, D. I. Erandi N.; Halvorsen, Britt (Journal article; Peer reviewed, 2015-11-25)Recovery of heavy oil is associated with challenges in terms of early water or gas breakthrough caused by the fingering phenomenon. This study is related to Californian heavy oil production and includes 2D simulations of ... -
Determination of onset of bubbling and slugging in a fluidized bed using a dual-plane electric capacitance tomography system
Agu, Cornelius Emeka; Tokheim, Lars-André; Eikeland, Marianne Sørflaten; Halvorsen, Britt (Journal article; Peer reviewed, 2017)For a successful application of fluidized beds in chemical reactions and solids circulation, the boundary of regime of operation such as bubbling and slugging regimes, needs to be clearly defined. This study provides a ... -
Eulerian-Eulerian simulation of heat transfer between a gas-solid fluidized bed and an immersed tube-bank with horizontal tubes
Yusuf, Rahel; Halvorsen, Britt; Melaaen, Morten Christian (Journal article; Peer reviewed, 2011-04-15)A two dimensional Eulerian-Eulerian simulation of tube-to-bed heat transfer is carried out for a cold gas fluidized bed with immersed horizontal tubes. The horizontal tubes are modelled as obstacles with square cross section ... -
Gasification of Biomass for Production of Syngas for Biofuel
Adhikari, Umesh; Eikeland, Marianne Sørflaten; Halvorsen, Britt (Journal article; Peer reviewed, 2015)Continuously increasing price of oil and gas, energy crisis and increased environmental consciousness towards the greenhouse gas emission have opened a new opportunity to the biomass, the oldest source of energy known to ... -
Investigation of flow behaviour in biomass gasifier using Electrical capacitance Tomography (ECT) and pressure sensors
Thapa, Rajan Kumar; Rautenbach, Christo; Halvorsen, Britt (Conference object; Peer reviewed, 2011)The particles in a biomass gasifier are mainly a mixture of wood chips, char particles and bed material. The charwood particles have a significant lower density than the bed material, and also a wider range of particle ... -
Investigation of the shifting-parameter as a function of density in the fluidization of a packed bed
Rautenbach, Christo; Melaaen, Morten Christian; Halvorsen, Britt (Conference report, 2010)Accurate predictions of pressure drops in fluidized beds are of great importance in the industry. Up to date no satisfactory correlation exists to predict the pressure drop in a fluidized bed as the bed is traversing from ... -
Investigation of the shifting-parameter as a function of particle size distribution in a fluidized bed traversing from a fixed to fluidized bed
Rautenbach, Christo; Melaaen, Morten Christian; Halvorsen, Britt (Conference object; Peer reviewed, 2010)The particles in a biomass gasifier are mainly a mixture of wood chips, char particles and bed material. The charwood particles have a significant lower density than the bed material, and also a wider range of particle ... -
Near Well CFD Simulation of SAGD Extra Heavy Oil Production
Kahawalage, Amila Chandra; Halvorsen, Britt; Mathiesen, Vidar (Journal article; Peer reviewed, 2015-11-25)Near well computational fluid dynamic simulation for extra heavy oil production using steam assisted gravity drainage was studied with ANSYS Fluent software. Computational fluid dynamic simulation can predict the multiphase ... -
Near Well Simulation and Modelling of Oil Production From Heavy Oil Reservoirs
Malagalage, Anjana; Halvorsen, Britt (Conference object; Peer reviewed, 2015-11-25)Heavy oil reservoirs cover up two third of the world's hydrocarbon reservoirs. Even though it is vast energy resource, heavy oil recovery is not considered economical due to its high viscous properties. Generally horizontal ... -
Near Well Simulation of CO2 Injection for Enhanced Oil Recovery (EOR)
Chathurangani, L.B.J.; Halvorsen, Britt (Journal article; Peer reviewed, 2015-11-25)A major challenge in oil industry is the declining oil production and the relatively low recovery rate. Estimates show that although the oil is localized and mobile, more than half of the oil is remaining in the reservoir ... -
Near Well Simulation of Extra-Heavy Oil Production Using SAGD
Kou, Guandong; Halvorsen, Britt (Conference object; Peer reviewed, 2015-11-25)Heavy oil and bitumen represent a massive world resource more than twice the size of global reserves of light or conventional oil. In reservoirs with extra heavy oil and bitumen, thermal methods are used to reduce the oil ... -
Nearwell Simulation of a horizontal well in Atlanta Field in Brazil with AICV® completion using OLGA/Rocx
Aparecida Da Silva, Katia; Halvorsen, Britt (Journal article; Peer reviewed, 2015-11-25)Brazil has special attention in the world oil scenario due its recent findings of oil reservoirs. Most of these reservoirs are heavy oil. The increasing energy consumption and discovery of heavy oil reservoirs require more ... -
Pressure drop, flow pattern and local water volume fraction measurements of oil-water flow in pipes
Kumara, W.A.S.; Halvorsen, Britt; Melaaen, Morten Christian (Journal article; Peer reviewed, 2009-11)Oil-water flow in horizontal and slightly inclined pipes was investigated. The experimental activities were performed using the multiphase flow loop at Telemark University College, Porsgrunn, Norway. The two-fluid model ... -
Simulation of CO2-Distribution in Fractured Oil Reservoir
Furuvik, Nora Cecilie Ivarsdatter; Halvorsen, Britt (Conference object; Peer reviewed, 2015-11-25)Deep geologic injections and storage of Carbon dioxide (CO2) for enhanced oil recovery (EOR) are an upcoming combination due to the potential for increased oil production from depleted oilfields at the same time reducing ... -
Simulation of Gasification of Livestock Manure with Aspen Plus
Haugen, Hildegunn H.; Halvorsen, Britt; Eikeland, Marianne Sørflaten (Conference object; Peer reviewed, 2015-11-25)Gasification is a flexible technology where all types of organic waste including biomass from manure can be used as feed to the reactor. The recovery of energy from solid waste offers several benefits including substantial ...