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On the Importance of Model Selection for CFD Analysis of High Temperature Gas-Solid Reactive Flow; Case Study: Post Combustion Chamber of HIsarna Off-Gas System

Hosseini, A. (author), Hage, Johannes (author), Meijer, Koen (author), Offerman, S.E. (author), Yang, Y. (author)

In this paper a CFD analysis of HIsarna off-gas system for post combustion of CO-H2-carbon particle mixture is presented to evaluate the effect of different sub-models and parameters on the accuracy of predictions and simulation time. The effects of different mesh type, mesh grid size, radiation models, turbulent models, kinetic mechanism,...

journal article 2023

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Computational Fluid Dynamics Modeling of HIsarna Off-Gas System: Wall Modeling and Heat Loss Prediction

Hosseini, A. (author), Calis, Randy (author), van der Plas, Dirk (author), Put, Pieter (author), Agema, Jelle (author), Meijer, Koen (author), Hage, Johannes (author), Offerman, S.E. (author), Yang, Y. (author)

The HIsarna off-gas system wall is a cooling jacket made of cooling pipes arranged in the radial direction and in a circular pattern. Part of the off-gas system cooling pipes are isolated using a low-thermal-conductivity refractory material to protect the cooling pipe from melting and thermal stresses. During long runs and due to...

journal article 2023

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Silicon in hot metal from a blast furnace, the role of FeO

Hage, J. L.T. (author), van der Stel, J. (author), Yang, Y. (author)

Silicon [Si] in hot metal is an impurity acting in the steel shop as an energy source that is released by oxidation during oxygen blowing in the converter. Preferred silicon concentration in hot steel is typically 0.4 wt-% (± 0.1 wt-%), helping predictable and low-cost processing. In practice, the Si concentration is difficult to control and...

journal article 2022

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CFD modelling of the off-gas system HIsarna iron making process part 2: reflux chamber geometry modification and effects on flow behaviour

Hosseini, A. (author), Dhiman, Vinod (author), Meijer, Koen (author), Zeilstra, Christiaan (author), Hage, Johannes (author), Peeters, Tim (author), Offerman, S.E. (author), Yang, Y. (author)

A three-dimensional computational fluid dynamics (CFD) model for the HIsarna off-gas system is set up and validated by real plant data. In the model detailed reaction mechanism and kinetic data for post-combustion of CO-H2 mixture and carbon particles are incorporated. The results are presented and discussed in another study (Part 1) by the...

journal article 2022

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Experimental and Discrete Element Method Analysis of Galvanized Steel Scrap Particles Along and After an Inclined Chute

Georgakopoulos, E. (author), Hosseini, A. (author), Kerry, T.J. (author), Hage, Johannes (author), Meijer, Koen (author), Offerman, S.E. (author), Yang, Y. (author)

HIsarna is a novel ironmaking process with great raw materials versatility that is attractive for various secondary resources. Among the materials that can be recycled, there is steel scrap which is fed to the furnace bath through an inclined chute. The velocity distribution of the scrap particles along the chute affects the particles’...

journal article 2022

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Off-Gas System Scale-Up of HIsarna Iron-Making Process: A CFD-Based Approach

Hosseini, A. (author), Hage, Johannes L.T. (author), Duiker, Arjan (author), Meijer, Koen (author), Peeters, Tim (author), Offerman, S.E. (author), Yang, Y. (author)

For all industrial applications, predicting system characteristics and behavior plays a vital role before constructing costly and complex multi-physic systems. Correct and reliable predictions become even more important once the aim is to go from small- to large-scale processes to establish an industrial demonstrations. In this study, a CFD...

journal article 2022

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Thermodynamic analysis of zinc ferrite (ZnFe₂O₄) formation inside the HIsarna off-gas system

Hosseini, A. (author), Moosavi-Khoonsari, Elmira (author), Meijer, Koen (author), Hage, Johannes (author), Peeters, Tim (author), Offerman, S.E. (author), Yang, Y. (author)

HIsarna reactor is characterized by a high raw materials versatility and is therefore attractive for processing secondary iron sources. Among the materials that can be recycled through HIsarna, zinc-bearing material has drawn a special attention. Based on the plant data, once dust-containing Zinc was injected into the main reactor, a final...

journal article 2022

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Granular Flow Modeling of Galvanized Steel Scrap Injection into the HIsarna Iron-Making Reactor

Hosseini, A. (author), Georgakopoulos, E. (author), Dihman, Vinod (author), Hage, Johannes (author), Meijer, Koen (author), Zeilstra, Christiaan (author), Offerman, S.E. (author), Yang, Y. (author)

Galvanized steel scrap flow and injection into the HIsarna reactor are investigated using discrete element method (DEM). The scrap particle is fed into the reactor through an inclined chute and hits the slag surface where the zinc content is evaporated and solid particles melt. A DEM model is setup and validated using experimental data...

journal article 2022

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Zinc Vaporization and Self-reduction Behavior of Industrial Waste Residues for Recycling to the HIsarna Furnace

Kerry, T.J. (author), Peters, A.G.A. (author), Georgakopoulos, E. (author), Dugulan, A.I. (author), Meijer, Koen (author), Hage, Johannes (author), Offerman, S.E. (author), Yang, Y. (author)

Within the steelmaking industry, a large amount of zinc-bearing waste is produced which cannot be effectively treated through integrated steel mills. Concurrently, zinc smelters generate waste residues containing significant amounts of iron and zinc which are stored or landfilled. The zinc concentration of iron and steelmaking residues...

journal article 2022

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CFD modelling of the off-gas system of HIsarna iron making process. Part 1: model development using detailed reaction mechanism for post-combustion of CO–H₂ mixture and carbon particles

Hosseini, A. (author), Dhiman, Vinod (author), Meijer, Koen (author), Zeilstra, Christiaan (author), Hage, Johannes (author), Peeters, Tim (author), Offerman, S.E. (author), Yang, Y. (author)

The HIsarna process is a new and breakthrough smelting reduction process for hot metal (liquid iron) production from iron ores and coal directly fed into the reactor. The flue gas from the main reactor enters the off-gas system containing small amounts of H₂, CO and carbon particles which need to be removed before further treatment...

journal article 2022

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Knickpoints and crescentic bedform interactions in submarine channels

Chen, Ye (author), Parsons, Daniel R. (author), Simmons, Stephen M. (author), Williams, Rebecca (author), Cartigny, Matthieu J.B. (author), Hughes Clarke, John E. (author), Stacey, Cooper D. (author), Hage, Sophie (author), Azpiroz Zabala, M. (author)

Submarine channels deliver globally important volumes of sediments, nutrients, contaminants and organic carbon into the deep sea. Knickpoints are significant topographic features found within numerous submarine channels, which most likely play an important role in channel evolution and the behaviour of the submarine sediment-laden flows ...

journal article 2021

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Direct Monitoring Reveals Initiation of Turbidity Currents From Extremely Dilute River Plumes

Hage, Sophie (author), Cartigny, Matthieu J.B. (author), Sumner, Esther J. (author), Clare, Michael A. (author), Hughes Clarke, John E. (author), Talling, Peter J. (author), Lintern, D. Gwyn (author), Simmons, Stephen M. (author), Azpiroz Zabala, M. (author)

Rivers (on land) and turbidity currents (in the ocean) are the most important sediment transport processes on Earth. Yet how rivers generate turbidity currents as they enter the coastal ocean remains poorly understood. The current paradigm, based on laboratory experiments, is that turbidity currents are triggered when river plumes exceed a...

journal article 2019

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How Good Is Your Puppet?: An Empirically Defined and Validated Quality Model for Puppet

Van der Bent, Eduard (author), Hage, Jurriaan (author), Visser, Joost (author), Gousios, G. (author)

Puppet is a declarative language for configuration management that has rapidly gained popularity in recent years. Numerous organizations now rely on Puppet code for deploying their software systems onto cloud infrastructures. In this paper we provide a definition of code quality for Puppet code and an automated technique for measuring and rating...

conference paper 2018

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Elongation-Competent Pauses Govern the Fidelity of a Viral RNA-Dependent RNA Polymerase

Dulin, D. (author), Vilfan, I.D. (author), Berghuis, B.A. (author), Hage, S. (author), Bamford, D.H. (author), Poranen, M.M. (author), Depken, S.M. (author), Dekker, N.H. (author)

RNA viruses have specific mutation rates that balance the conflicting needs of an evolutionary response to host antiviral defenses and avoidance of the error catastrophe. While most mutations are known to originate in replication errors, difficulties of capturing the underlying dynamics have left the mechanochemical basis of viral mutagenesis...

journal article 2015

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Mechanism of Homology Recognition in DNA Recombination from Dual-Molecule Experiments

De Vlaminck, I. (author), Van Loenhout, M.T.J. (author), Zweifel, L. (author), Den Blanken, J. (author), Hooning, K. (author), Hage, S. (author), Kerssemakers, J. (author), Dekker, C. (author)

In E. coli homologous recombination, a filament of RecA protein formed on DNA searches and pairs a homologous sequence within a second DNA molecule with remarkable speed and fidelity. Here, we directly probe the strength of the two-molecule interactions involved in homology search and recognition using dual-molecule manipulation, combining...

journal article 2012

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Exploring and dissecting genome-wide gene expression responses of Penicillium chrysogenum to phenylacetic acid consumption and penicillinG production

Harris, D.M. (author), Van der Krogt, Z.A. (author), Klaassen, P. (author), Raamsdonk, L.M. (author), Hage, S. (author), Van den Berg, M.A. (author), Bovenberg, R.A.L. (author), Pronk, J.T. (author), Daran, J.M. (author)

OA Fund TU Delft Background Since the discovery of the antibacterial activity of penicillin by Fleming 80 years ago, improvements of penicillin titer were essentially achieved by classical strain improvement through mutagenesis and screening. The recent sequencing of Penicillium chrysogenum strain Wisconsin1255-54 and the availability of...

journal article 2009

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Reinitiated viral RNA-dependent RNA polymerase resumes replication at a reduced rate

Vilfan, I.D. (author), Candelli, A. (author), Hage, S. (author), Aalto, A.P. (author), Poranen, M.M. (author), Bamford, D.H. (author), Dekker, N.H. (author)

RNA-dependent RNA polymerases (RdRP) form an important class of enzymes that is responsible for genome replication and transcription in RNA viruses and involved in the regulation of RNA interference in plants and fungi. The RdRP kinetics have been extensively studied, but pausing, an important regulatory mechanism for RNA polymerases that has...

journal article 2008

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Controlling the surface properties of nanostructures for studies of polymerases

Crut, A. (author), Koster, D.A. (author), Huang, Z. (author), Hage, S. (author), Dekker, N.H. (author)

journal article 2008

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End-joining long nucleic acid polymers

Van den Hout, M. (author), Hage, S. (author), Dekker, C. (author), Dekker, N.H. (author)

Many experiments involving nucleic acids require the hybridization and ligation of multiple DNA or RNA molecules to form a compound molecule. When one of the constituents is single stranded, however, the efficiency of ligation can be very low and requires significant individually tailored optimization. Also, when the molecules involved are very...

journal article 2008

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Reinitiated viral RNA-dependent RNA polymerase resumes replication at a reduced rate

Vilfan, I.D. (author), Candelli, A. (author), Hage, S. (author), Aalto, A.P. (author), Poranen, M.M. (author), Bamford, D.H. (author), Dekker, N.H. (author)

RNA-dependent RNA polymerases (RdRP) form an important class of enzymes that is responsible for genome replication and transcription in RNA viruses and involved in the regulation of RNA interference in plants and fungi. The RdRP kinetics have been extensively studied, but pausing, an important regulatory mechanism for RNA polymerases that has...

journal article 2008