165 citations · 446 across the 20 of their papers we have counts for
20 papers
Spray flamelet structures in a tubular counterflow configuration
Francisco Rivadeneira, Felipe Huenchuguala, Arne Scholtissek +3
In this work, spray flamelet structures subject to curvature are systematically studied, emphasizing the ways in which this quantity modifies the budgets of the corresponding flame…
Solutions of the spray flamelet equations in a non-monotonic mixture fraction space
Felipe Huenchuguala, Luis Fuenzalida, Oscar Orellana +4
Solving the spray flamelet equations in composition space is very challenging, which is attributable to the fact that the maximum value of the mixture fraction, , i…
Unsteady solutions of the spray flamelet equations
Felipe Huenchuguala, Francisco Rivadeneira, Arne Scholtissek +3
Solutions of the spray flamelet equations reported in the literature during the last decade have been limited to very specific situations presenting steady evaporation profiles onl…
Numerical Analysis of the Stability of Iron Dust Bunsen Flames
Thijs Hazenberg, Daniel Braig, Johannes Mich +2
This article presents numerical simulations of the response of an iron dust Bunsen flame to particle seeding changes. A validated numerical model is used to study the impact of par…
Analyzing Iron Dust Bunsen Flames using Numerical Simulations
Thijs Hazenberg, Danial Braig, Michal A. Fedoryk +7
This article presents numerical simulations of an iron dust Bunsen flame. The results are validated against experimental results. The burning velocity is extracted from the 3D simu…
Critical nanoparticle formation in iron combustion: single particle experiments with in-situ multi-parameter diagnostics aided by multi-scale simulations
Tao Li, Bich-Diep Nguyen, Yawei Gao +6
The formation of iron oxide nanoparticles (NPs) presents challenges such as efficiency losses and fine dust emissions in practical iron combustion systems, highlighting the need fo…
Advantages of the adoption of a generalized flame displacement velocity as a central element of flamelet theory
Hernan Olguin, Pascale Domingo, Luc Vervisch +2
In combustion theory, flames are usually described in terms of the dynamics of iso-surfaces of a specific scalar. The flame displacement speed is then introduced as a local variabl…
On the closure of curvature in 2D flamelet theory
Hernan Olguin, Pascale Domingo, Luc Vervisch +2
So far, flamelet theory has treated curvature as an independent parameter requiring specific means for closure. In this work, it is shown how the adoption of a two-dimensional orth…
Carrier-phase DNS of ignition and combustion of iron particles in a turbulent mixing layer
Tien Duc Luu, Ali Shamooni, Andreas Kronenburg +9
Three-dimensional CP-DNS of reacting iron particle dust clouds in a turbulent mixing layer are conducted. The simulation approach considers the Eulerian transport equations for the…
Can flamelet manifolds capture the interactions of thermo-diffusive instabilities and turbulence in lean hydrogen flames? -- An a-priori analysis
Hannes Böttler, Driss Kaddar, Federica Ferraro +3
Flamelet-based methods are extensively used in modeling turbulent hydrocarbon flames. However, these models have yet to be established for (lean) premixed hydrogen flames. While fl…
Dynamic stabilization of a hydrogen premixed flame in a narrow channel
Faizan Habib Vance, Arne Scholtissek, Philip de Goey +2
Combustion of hydrogen can help in reducing carbon-based emissions but it also poses unique challenges related to the high flame speed and Lewis number effects of the hydrogen flam…
Application of dense neural networks for manifold-based modeling of flame-wall interactions
Julian Bissantz, Jeremy Karpowski, Matthias Steinhausen +5
Artifical neural networks (ANNs) are universal approximators capable of learning any correlation between arbitrary input data with corresponding outputs, which can also be exploite…
A comparison of mechanistic models for the combustion of iron microparticles and their application to polydisperse iron-air suspensions
Johannes Mich, Daniel Braig, Tobias Gustmann +2
Metals can serve as carbon-free energy carriers, e. g. in innovative metal-metal oxide cycles as proposed by Bergthorson (Prog. Energy Combust. Sci., 2018). Iron powder is a suitab…
The potential of retrofitting existing coal power plants: a case study for operation with green iron
Johannes Janicka, Paulo Debiagi, Arne Scholtissek +5
Storing electrical energy for long periods and transporting it over long distances is an essential task of the necessary transition to a CO-free energy economy. An oxidation-re…
Techno-economic assessment of long-distance supply chains of energy carriers: Comparing hydrogen and iron for carbon-free electricity generation
Jannik Neumann, Rodolfo Cavaliere Da Rocha, Paulo Debiagi +4
Effective usage of renewable energy requires ways of storage and delivery to balance energy demand and availability divergences. Carbon-free chemical energy carriers are proposed s…
Flamelet modeling of thermo-diffusively unstable hydrogen-air flames
Hannes Böttler, Haris Lulic, Matthias Steinhausen +3
In order to reduce CO2 emissions, hydrogen combustion has become increasingly relevant for technical applications. In this context, lean H2-air flames show promising features but,…
Numerical modeling of pulverized iron flames in a multidimensional hot counterflow burner
Xu Wen, Arne Scholtissek, Jeroen van Oijen +2
Pulverized iron flames stabilized in a multidimensional hot counterflow burner are simulated using a numerical model, which is extended from the state-of-the-art model developed by…
Effect of flame retardants on side-wall quenching of partially premixed laminar flames
Matthias Steinhausen, Federica Ferraro, Max Schneider +5
A combined experimental and numerical investigation of partially premixed laminar methane-air flames undergoing side-wall quenching (SWQ) is performed. A well-established SWQ burne…
Flame-vortex interaction during turbulent side-wall quenching and its implications for flamelet manifolds
Matthias Steinhausen, Thorsten Zirwes, Federica Ferraro +3
In this study, the thermochemical state during turbulent flame-wall interaction of a stoichiometric methane-air flame is investigated using a fully resolved simulation with detaile…
Iron as a sustainable chemical carrier of renewable energy: Analysis of opportunities and challenges for retrofitting coal-fired power plants
Paulo Debiagi, Rodolfo Cavaliere da Rocha, Arne Scholtissek +2
As a result of the 2021 United Nations Climate Change Conference (COP26), several countries committed to phasing down coal electricity as soon as possible, deactivating hundreds of…