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Dive into the research topics where Jan Erik Olsen is active.

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Featured researches published by Jan Erik Olsen.


Progress in Computational Fluid Dynamics | 2012

A parcel based modelling concept for studying subsea gas release and the effect of gas dissolution

Paal Skjetne; Jan Erik Olsen

A modelling concept for analysing the fate of a subsea gas release is presented. The concept is based on a coupled Eulerian–Lagrangian method. The gas bubbles are modelled and tracked as parcels in a Lagrangian Discrete Phase Model (DPM). The continuous water and atmospheric gas are covered by an Eulerian VOF model. The model accounts for compressible gas effects, bubble size, gas dissolution and is fully transient. It compares well with experiments from a release depth of 7 m. The concept is applied to a set of release scenarios and the results are presented.


Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science | 2016

Mechanisms and Kinetics of Boron Removal from Silicon by Humidified Hydrogen

Jafar Safarian; Kai Tang; Jan Erik Olsen; Stefan Andersson; Gabriella Tranell; Kjetil Hildal

The removal of boron from silicon by top blowing of humidified hydrogen has been studied in the present work through experimental work, thermodynamic calculations, computational fluid dynamic modeling, and quantum chemistry calculations. The effect of process parameters; temperature, lance diameter, lance distance from the melt surface, gas flow rate, and crucible material on the kinetics of boron removal were studied. It has been shown that the rate of boron removal is decreased with increasing temperature due to the competitive reactions between silicon and oxygen as well as boron and oxygen, which can be confirmed with the increases of pSiO/pHBO in the system. The rate of boron removal is increased with increasing the gas flow rate due mainly to the better supply and transport of the gas over the melt surface, as confirmed by the CFD modeling. Moreover, the rate of boron removal in alumina crucible is the highest followed by that in quartz and graphite crucibles, respectively. Faster B removal in quartz crucible than that in graphite crucible can be attributed to more oxygen dissolves in silicon melts. The fastest boron removal in alumina crucible is attributed to the additional boron gasification through aluminum borate (AlBO2) formation on the melt surface. Thermodynamic properties of the AlBO2 species have thus been revised by quantum chemistry calculations, which were more accurate to describe the formation of gaseous AlBO2 than those in the JANAF Thermochemical Tables. The main chemical reactions for boron gasification from silicon melts are proposed as


Volume 7: Ocean Space Utilization; Professor Emeritus J. Randolph Paulling Honoring Symposium on Ocean Technology | 2014

CFD STUDY OF SURFACE FLOW AND GAS DISPERSION FROM A SUBSEA GAS RELEASE

Qing Qing Pan; Jan Erik Olsen; Stein Tore Johansen; Mark Reed; Lars Roar Sætran


Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science | 2017

Model of Silicon Refining During Tapping: Removal of Ca, Al, and Other Selected Element Groups

Jan Erik Olsen; Ida Kero; Thorvald Abel Engh; Gabriella Tranell

{\text{In graphite, quartz and alumina crucible}}:\quad \underline{\text{B}} + \underline{\text{H}} + \underline{\text{O}} = {\text{ HBO}}\left( {\text{g}} \right)


Progress in Computational Fluid Dynamics | 2015

The significance of lift forces in intensely stirred bubble plumes

Jan Erik Olsen; Mihaela Popescu


Applied Ocean Research | 2009

CFD modeling of plume and free surface behavior resulting from a sub-sea gas release

Schalk Cloete; Jan Erik Olsen; Paal Skjetne

In graphite, quartz and alumina crucible:B̲+H̲+O̲=HBOg


Oxidation of Metals | 2012

Mechanisms and Kinetics of Liquid Silicon Oxidation During Industrial Refining

Mari K. Næss; Gabriella Tranell; Jan Erik Olsen; Nils Eivind Kamfjord; Kai Tang


Canadian Journal of Chemical Engineering | 2016

Current understanding of subsea gas release: A review

Jan Erik Olsen; Paal Skjetne

{\text{In alumina crucible}}:\underline{\text{Al}} + \underline{\text{B}} + \underline{\text{O}} = {\text{ AlBO}}_{2} \left( {\text{g}} \right)


Oxidation of Metals | 2012

Active Oxidation of Liquid Silicon: Experimental Investigation of Kinetics

Mari K. Næss; D. J. Young; Jianqiang Zhang; Jan Erik Olsen; Gabriella Tranell


Chemical Engineering Science | 2017

Mass transfer between bubbles and seawater

Jan Erik Olsen; Dorien Dunnebier; Emlyn John Davies; Paal Skjetne; John Morud

In alumina crucible:Al̲+B̲+O̲=AlBO2gBased on the obtained results, it has been proposed that boron removal from silicon melt by humidified hydrogen is controlled both by the chemical reaction for boron gasification and mass transport in the adjacent gas phase.

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Gabriella Tranell

Norwegian University of Science and Technology

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Mari K. Næss

Norwegian University of Science and Technology

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