@article {353, title = {Analysis and evaluation of steady-state and non-steady-state preserving operator splitting schemes for reaction-diffusion(-advection) problems}, journal = {Combustion and Flame}, volume = {255}, year = {2023}, month = {Jan-09-2023}, pages = {112881}, issn = {00102180}, doi = {10.1016/j.combustflame.2023.112881}, url = {https://doi.org/10.1016/j.combustflame.2023.112881}, author = {B{\"o}senhofer, Markus} } @conference {361, title = {Design and Simulation of flow field for sinusoidal scaffold using Computational fluid dynamics}, booktitle = {XXIX Congress of International/Japanese Society of Biomechanics}, year = {2023}, month = {08/2023}, publisher = {International Society of Biomechanics}, organization = {International Society of Biomechanics}, abstract = {

Bone can heal small defects by itself but fails to do so in case of severe bone damage. A common treatment for severe damage is grafting bone. Approximately 1.6 million bone grafts are performed in the United States per year [1]. Unfortunately, this treatment has several serious drawbacks, such as a high risk of infections or even donor site morbidities. Tissue Engineering and regenerative medicine is a promising biomedical alternative to cure severe bone damage. Scaffolds can be used to re-build the bone structure since they can support seeded cells and provide an optimal environment for cell growth [2]. The scaffold{\textquoteright}s geometry design influences flow characteristics, mass transfer rates, and wall shear stress (WSS). The WSS is an important parameter to investigate because it affects the differentiation and bioactivity of cells inside the scaffold. In this work, we investigate the influence of the scaffold geometry on the flow field, WSS and mass transport using computational fluid dynamics (CFD). The reliability of the numerical results is evaluated using the μ-particle image velocimetry (PIV) method.

}, keywords = {3D printing, CFD, OpenFOAM, Scaffold geometry, scaffolds, Wall shear stress}, author = {Theresia Baumgartner and Markus B{\"o}senhofer and Olivier Guillaume and Aleksandr Ovsianikov and Michael Harasek and Margit Gf{\"o}hler} } @article {335, title = {The effect of turbulence on the conversion of coal under blast furnace raceway conditions}, journal = {Fuel}, volume = {331}, year = {2023}, month = {Jan-01-2023}, pages = {125840}, issn = {00162361}, doi = {10.1016/j.fuel.2022.125840}, url = {https://doi.org/10.1016/j.fuel.2022.125840}, author = {Wartha, Eva-Maria and Haugen, Nils Erland and Karchniwy, Ewa and B{\"o}senhofer, Markus and Harasek, Michael and L{\o}v{\r a}s, Terese} } @conference {355, title = {An Eulerian-Based Reduction Model for Iron Ore Particle Reduction}, booktitle = {AISTech 2023AISTech 2023 Proceedings}, year = {2023}, publisher = {AIST}, organization = {AIST}, doi = {10.33313/38710.33313/387/039}, url = {https://imis.aist.org/store/detail.aspx?id=https://imis.aist.org/store/detail.aspx?id=PR-387-039}, author = {B{\"o}senhofer, M. and Feilmayr, C. and Harasek, M. and Hauzenberger, F. and Stocker, H.} } @conference {362, title = {How do sinusoidal scaffolds affect fluid flow-induced wall shear stress and mass transport?}, booktitle = {28th Congress of the European Society of Biomechanics }, year = {2023}, month = {07/2023}, publisher = {European Society of Biomechanics}, organization = {European Society of Biomechanics}, abstract = {

Bone is one of the most transplanted tissues. About 1.6 million bone grafts are performed each year only in the United States [1]. This treatment has serious drawbacks, such as a higher risk of infections or even donor site morbidities. Therefore, an alternative is the use of scaffolds to create bone tissue. The role of scaffolds in bone tissue engineering is to mimic the native bone tissue and is used to provide a template that supports seeded cells to get an optimal environment for their proliferation [2] to re-build the damaged structure. Hence, an optimal scaffold design is important and must be found because even small changes in the geometry of the pore network of the scaffold influences the process of cell growth and mechanical properties [2,3]. Wall shear stress (WSS) has a significant role in the differentiation of cells, especially for bone. Even minor changes in the flow field, especially near the wall regions, can directly affect cell bioactivity. Therefore, in this work, we use computational fluid dynamics (CFD) simulations to investigate the WSS and the effect of the flow rate on mass transport rates in scaffolds. The numerical results were compared to {\textmu}-particle image velocimetry (PIV) experiments to evaluate the reliability of the CFD method.

}, keywords = {bone tissue, CFD, PIV, scaffolds, Wall shear stress}, author = {Theresia Baumgartner and Markus B{\"o}senhofer and Olivier Guillaume and Aleksandr Ovsianikov and Michael Harasek and Margit Gf{\"o}hler} } @article {363, title = {Influence of Raceway Shape on Species Concentration}, journal = {Iron \& Steel Technology}, volume = {20}, year = {2023}, month = {Aug-07-2024}, issn = {15470423}, doi = {10.33313/TR/0823}, url = {https://imis.aist.org/store/detail.aspx?id=PR-TN0823-1}, author = {B{\"o}senhofer, Markus and Wartha, Eva-Maria and Hauzenberger, Franz and Stocker, Hugo and Feilmayr, Christoph and Harasek, Michael} } @conference {354, title = {Investigation of the Thermally Thick Alternative Reducing Agent Behavior in the Raceway Zone}, booktitle = {AISTech 2023AISTech 2023 Proceedings}, year = {2023}, publisher = {AIST}, organization = {AIST}, doi = {10.33313/38710.33313/387/042}, url = {https://imis.aist.org/store/detail.aspx?id=https://imis.aist.org/store/detail.aspx?id=PR-387-042}, author = {B{\"o}senhofer, M. and Feilmayr, C. and Harasek, M. and Hauzenberger, F. and Kiss, M. and Stocker, H.} } @article {350, title = {Liquid{\textendash}Liquid Phase Separation of Two Non-Dissolving Liquids{\textemdash}A Mini Review}, journal = {Processes}, volume = {11}, year = {2023}, month = {Jan-04-2023}, pages = {1145}, doi = {10.3390/pr11041145}, url = {https://www.mdpi.com/2227-9717/11/4/1145https://www.mdpi.com/2227-9717/11/4/1145/pdf}, author = {Dimitrijevi{\'c}, Dragana and B{\"o}senhofer, Markus and Harasek, Michael} } @conference {359, title = {Modelling of Multi Stage Internal Loop Air Lift Bioreactor Utilizing Computational Fluid Dynamics}, booktitle = {17th Minisymposium Verfahrenstechnik}, year = {2023}, month = {April}, publisher = {University of Natural Resources and Life Sciences (BOKU), Department of Material Sciences and Process Engineering, Institute for Chemical and Energy Engineering, Muthgasse 107, A-1190 Wien editor= Bernhard Kling and Thomas Keller pages=84-89}, organization = {University of Natural Resources and Life Sciences (BOKU), Department of Material Sciences and Process Engineering, Institute for Chemical and Energy Engineering, Muthgasse 107, A-1190 Wien editor= Bernhard Kling and Thomas Keller pages=84-89}, author = {Ramonet, Fernando and Haddadi, Bahram and B{\"o}senhofer, Markus and Harasek, Michael} } @conference {356, title = {A Novel Test Rig for the Evaluation of Auxiliary Reducing Agents (ARAs)}, booktitle = {AISTech 2023AISTech 2023 Proceedings}, year = {2023}, publisher = {AIST}, organization = {AIST}, doi = {10.33313/38710.33313/387/044}, url = {https://imis.aist.org/store/detail.aspx?id=https://imis.aist.org/store/detail.aspx?id=PR-387-044}, author = {B{\"o}senhofer, M. and Feilmayr, C. and Harasek, M. and Hauzenberger, F. and Nanz, T. and Rieger, J. and Stocker, H.} } @conference {364, title = {Operator splitting versus source linearization for the reaction-(advection)-diffusion equation in OpenFOAM{\textregistered}}, booktitle = {31. Deutscher Flammentag Manuskripte }, year = {2023}, month = {09/2023}, abstract = {

Novel combustion technologies like MILD or (ultra-)lean combustion aim to reduce pollutant emissions and increase process efficiency. Pollutants are reduced by distributing the reaction zone over large regions and keeping the combustion temperature low. Lower temperatures also reduce heat loss and increase combustion efficiency. These combustion conditions can come at the cost of unstable operation caused by frequent near-extinction or near-ignition states in the flame. These unstable states must be captured when modeling MILD or (ultra-)lean flames. Solving the reaction-advection-diffusion fully coupled is often prohibitive because of the numerical effort and the memory requirements. Common Computational Fluid Dynamics (CFD) codes use operator splitting (OS) schemes to overcome this issue. OS divides the reaction-diffusion problem into sub-problems and provides an algorithm to recover the original problem{\textquoteright}s solution by combining the sub-problems. The advantage of OS is that the individual sub-problems, e.g., transport and chemistry, can be solved with specialized solvers. The main drawback of using OS schemes is a loss of accuracy when recovering the original problem. Near-ignition or near-extinction states pose a peculiar problem for OS schemes, and the predicted results can deviate significantly from the actual one; furthermore, they can introduce a time step size dependence of the steady-state solution. OpenFOAM{\textregistered} uses a particular OS; the chemistry sub-problem is linearized and added as an explicit source to the transport problem. Technically speaking, this approach is not an OS but a source term linearization. As the open-source CFD toolbox OpenFOAM{\textregistered} is increasingly used for combustion simulations, understanding the accuracy, the steady-state consistency and the temporal evolution of the linearization approach is essential. In this work, the performance of the OpenFOAM{\textregistered} source linearization is evaluated and compared to OS schemes. The accuracy and steady-state consistency are evaluated by scalar linear stability analysis, while the temporal evolution is evaluated using near-ignition and near-extinction perfectly-stirred reactor test cases.

}, keywords = {Linear stability analysis, OpenFOAM{\textregistered}, operator splitting, Perfectly stirred reactor (PSR), Reaction-diffusion(-advection) equation, Reactive flow}, author = {Markus B{\"o}senhofer} } @conference {360, title = {SAE Technical Paper SeriesExperimental Collision and Swirl of CFD Simulated Fuel Sprays in a Dual Injector Cylinder Head Concept}, booktitle = {16th International Conference on Engines \& VehiclesSAE Technical Paper Series}, year = {2023}, publisher = {SAE International}, organization = {SAE International}, address = {Capri, Italy400 Commonwealth Drive, Warrendale, PA, United States}, doi = {10.4271/2023-24-0080}, url = {https://www.sae.org/content/2023-24-0080https://www.sae.org/gsdownload/?prodCd=2023-24-0080}, author = {Gutierrez, Marcos and Taco, Diana and B{\"o}senhofer, Markus and Harasek, Michael and Castillo, Andres and Iniguez, Juan and Reyes, Gorky and Guanuche, Denny} } @article {328, title = {Dataset for the Heat-Up and Heat Transfer towards Single Particles and Synthetic Particle Clusters from Particle-Resolved CFD Simulations}, journal = {Data}, volume = {7}, year = {2022}, month = {Jan-02-2022}, pages = {23}, doi = {10.3390/data7020023}, url = {https://www.mdpi.com/2306-5729/7/2/23https://www.mdpi.com/2306-5729/7/2/23/pdf}, author = {Pichler, Mario and B{\"o}senhofer, Markus and Harasek, Michael} } @conference {336, title = {Effect of Different Diesel Fuel Nozzle Holes Geometries on Cavitation}, booktitle = {Conference on Sustainable Mobility SAE Technical Paper Series}, year = {2022}, publisher = {SAE International}, organization = {SAE International}, address = {400 Commonwealth Drive, Warrendale, PA, United States}, doi = {10.4271/2022-24-0027}, url = {https://www.sae.org/content/2022-24-0027}, author = {Gutierrez, Marcos and Taco, Diana and B{\"o}senhofer, Markus and Harasek, Michael and Castillo, Andres and Iniguez, Juan} } @article {317, title = {Enhanced kinetic model identification for gas{\textendash}solid reactions through Computational Fluid Dynamics}, journal = {Chemical Engineering Journal}, volume = {430}, year = {2022}, month = {Jan-02-2022}, pages = {132850}, issn = {13858947}, doi = {10.1016/j.cej.2021.132850}, url = {https://doi.org/10.1016/j.cej.2021.132850}, author = {Wartha, Eva-Maria and Birkelbach, Felix and B{\"o}senhofer, Markus and Harasek, Michael} } @article {326, title = {Heat Transfer Models for Dense Pulverized Particle Jets}, journal = {Processes}, volume = {10}, year = {2022}, month = {Jan-02-2022}, pages = {238}, doi = {10.3390/pr10020238}, url = {https://www.mdpi.com/2227-9717/10/2/238https://www.mdpi.com/2227-9717/10/2/238/pdf}, author = {B{\"o}senhofer, Markus and Pichler, Mario and Harasek, Michael} } @article {312, title = {Importance of considering interstitial fluid effects in the kinetic theory of granular flow for raceway formation prediction}, journal = {Chemical Engineering Science}, volume = {247}, year = {2022}, month = {Jan-01-2022}, pages = {117026}, issn = {00092509}, doi = {10.1016/j.ces.2021.117026}, url = {https://doi.org/10.1016/j.ces.2021.117026}, author = {Wartha, Eva-Maria and B{\"o}senhofer, Markus and Harasek, Michael} } @conference {333, title = {Influence of Raceway Shape on Species Concentration}, booktitle = {AISTech 2022 Proceedings of the Iron and Steel Technology ConferenceAISTech 2022 Proceedings of the Iron and Steel Technology Conference}, year = {2022}, publisher = {AIST}, organization = {AIST}, doi = {10.33313/38610.33313/386/023}, url = {http://digital.library.aist.org/pages/http://digital.library.aist.org/pages/PR-386-023.htm}, author = {Wartha, E. and B{\"o}senhofer, M. and Hauzenberger, F. and Stocker, H. and Feilmayr, C. and Harasek, M.} } @proceedings {321, title = {Artificial Neural Networks to Substitute the ODE Solver in Reactive Flow Simulations}, year = {2021}, month = {04/2021}, pages = {266-271}, author = {Wartha, EM and Cabrerea Ormaza, MD and B{\"o}senhofer, M and Harasek, M} } @conference {325, title = {A generic Euler-Euler multi-phase chemistry framework for OpenFOAM{\textregistered}}, booktitle = {18th Multiphase Flow Conference and Short Course: Simulation, Experiment and Application}, year = {2021}, month = {11/2021}, abstract = {

Multi-phase reactive flows are an immanent aspect of chemical engineering applications, e.g. solid fuel conversion, thermo-chemical energy storage, or heterogeneous catalysis. In recent years, applying computational methods for process optimization or intensification has become more popular. Computational Fluid Dynamics (CFD) provides a spatially resolved, steady-state or transient method to investigate complex processes. Flow, temperature, species profiles, and homogeneous chemistry are readily available in common CFD codes. Contrary, heterogeneous chemistry is typically only available in the Eulerian-Lagrangian (EL) modeling approach, while Euler-Euler (EE) implementations of heterogeneous chemistry are hardly available. Despite ever-increasing computational resources, modeling large- or industry-scale aggregates in the EL framework by e.g. CFD-DEM is still prohibitive. As a consequence, EE two-phase or multi-phase models are often employed to reduce the computational effort of granular phases by modeling their rheology with the Kinetic Theory of Granular Flows (KTGF). Providing a generic framework to include heterogeneous chemistry in the EE framework seems crucial to improve the application of CFD in industry-scale process development, optimization, or intensification. In this work, we present our implementation of such a multi-phase chemistry framework in the open-source CFD toolbox OpenFOAM{\textregistered}. The novel framework integrates seamlessly into the stock OpenFOAM{\textregistered} multiphaseEulerFoam solver and provides heterogeneous chemistry models of different complexity. The currently implemented heterogeneous chemistry models focus on gas-solid reactivity and range from detailed chemistry based on the SurfaceCHEMKIN formalism to effective rate approximations. A thorough introduction and discussion of the generic EE multi-phase chemistry framework are followed by an overview of the currently available gas-solid chemistry models. In the last part, we highlight the capabilities of the novel framework by presenting selected reactive multi-phase processes.

}, author = {Markus B{\"o}senhofer and Eva-Maria Wartha and Matthias Kiss and Michael Harasek} } @conference {313, title = {The Influence of Coke Reactivity on the Raceway Size {\textemdash} A Case Study}, booktitle = {AISTech 2021AISTech 2021 Proceedings of the Iron and Steel Technology Conference}, year = {2021}, publisher = {AIST}, organization = {AIST}, doi = {10.33313/38210.33313/382/252-83212-040}, url = {http://digital.library.aist.org/pages/PR-382http://digital.library.aist.org/pages/PR-382-152.htm}, author = {B{\"o}senhofer, M. and Wartha, E. and Hauzenberger, F. and Feilmayr, C. and Stocker, H. and Rieger, J. and Schatzl, M. and Harasek, M.} } @article {301, title = {Non-isothermal effectiveness factors in thermo-chemical char conversion}, journal = {Carbon Resources Conversion}, year = {2021}, month = {Jan-01-2021}, issn = {25889133}, doi = {10.1016/j.crcon.2021.01.004}, url = {https://www.sciencedirect.com/science/article/pii/S2588913321000120}, author = {B{\"o}senhofer, Markus and Harasek, Michael} } @proceedings {322, title = {opiTemp: A low budget, open-source optical temperature sensing system}, year = {2021}, month = {04/2021}, pages = {1455-1460}, author = {Markus B{\"o}senhofer and Felix Resch and Thomas Nanz and Michael Harasek} } @proceedings {323, title = {Particle Resolved Thermo-Chemical Conversion of Pulverized Coal Clusters}, year = {2021}, month = {10/2021}, pages = {10}, author = {Matthias Kiss and Markus B{\"o}senhofer and Magdalena Schatzl and Michael Harasek} } @proceedings {318, title = {On the role of heat transfer in the thermo-chemical conversion of pulverized coal}, year = {2021}, month = {10/2021}, pages = {38-49}, author = {Markus B{\"o}senhfoer and Franz Hauzenberger and Christoph Feilmayr and Hugo Stocker and Magdalena Schatzl and Michael Harasek} } @proceedings {319, title = {Species diffusion modeling in porous particles for metallurgical applications}, year = {2021}, month = {10/2021}, pages = {18-28}, author = {Matthias Kiss and Markus B{\"o}senhofer and Magdalena Schatzl and Michael Harasek} } @article {274, title = {Characteristic Chemical Time Scales for Reactive Flow Modeling}, journal = {Combustion Science and Technology}, year = {2020}, pages = {1-26}, doi = {10.1080/00102202.2020.1760257}, url = {https://doi.org/10.1080/00102202.2020.1760257}, author = {Eva-Maria Wartha and Markus B{\"o}senhofer and Michael Harasek} } @conference {300, title = {Combining an implicit solution with an explicit corrector step for the solution of the continuity equations in a two-fluid solver}, booktitle = {14th International Conference on CFD in 6 Oil \& Gas, Metallurgical and Process Industries SINTEF, Trondheim, Norway, October 12{\textendash}14, 2020}, year = {2020}, publisher = {SINTEF Academic Press}, organization = {SINTEF Academic Press}, address = {Trondheim, Norway}, url = {https://hdl.handle.net/11250/2720854}, author = {Wartha, Eva-Maria and B{\"o}senhofer, Markus and Harasek, Michael} } @article {280, title = {Computational fluid dynamics analysis of char conversion in Sandia{\textquoteright}s pressurized entrained flow reactor}, journal = {Review of Scientific Instruments}, volume = {91}, year = {2020}, month = {Jan-07-2020}, pages = {074103}, issn = {0034-6748}, doi = {10.1063/5.0005733}, url = {http://aip.scitation.org/doi/10.1063/5.0005733}, author = {B{\"o}senhofer, Markus and Hecht, Ethan and Shaddix, Christopher R. and K{\"o}nig, Bernhard and Rieger, Johannes and Harasek, Michael} } @conference {298, title = {Non-Isothermal Effectiveness Factors in Coal Combustion}, booktitle = {Proceedings of the 16. Minisymposium Verfahrenstechnik \& 7. Partikelforum}, year = {2020}, address = {Vienna, Austria}, isbn = {978-3-903337-01-5}, doi = {10.34726/543}, author = {B{\"o}senhofer, Markus and Harasek, Michael} } @conference {281, title = {Pulverized Coal Conversion in Blast Furnaces {\textemdash} Analysis of Involved Scales}, booktitle = {AISTech2020 Proceedings of the Iron and Steel Technology Conference}, year = {2020}, publisher = {AIST}, organization = {AIST}, doi = {10.33313/38010.33313/380/032}, url = {http://digital.library.aist.org/pages/PR-380http://digital.library.aist.org/pages/PR-380-032.htm}, author = {B{\"o}senhofer, M. and Wartha, E. and Jordan, C. and Hauzenberger, F. and Feilmayr, C. and Stocker, H. and Rieger, J. and K{\"o}nig, B. and Harasek, M.} } @conference {299, title = {Region Coupling Algorithms in OpenFoam}, booktitle = {Proceedings of the 16. Minisymposium Verfahrenstechnik \& 7. Partikelforum}, year = {2020}, address = {Vienna, Austria}, isbn = {978-3-903337-01-5}, doi = {10.34726/544}, author = {Kiss, Matthias and B{\"o}senhofer, Markus and Schatzl, Magdalena and Harasek, Michael} } @conference {249, title = {Mesh Partitioning of Reactive Flow Simulations {\textendash} Speed-up and Other Side Effects}, booktitle = {9th European Combustion Meeting}, year = {2019}, month = {04/2019}, address = {Lisbon, Portugal}, author = {Wartha, E.-M. and B{\"o}senhofer, M. and Jordan, C. and Harasek, M.} } @conference {250, title = {Multi-Phase Reactive Systems {\textendash} Analysis of Involved Time Scales}, booktitle = {9th European Combustion Meeting}, year = {2019}, month = {04/2019}, address = {Lisbon, Portugal}, author = {M. B{\"o}senhofer and Wartha, E.-M. and Jordan, C. and K{\"o}nig, B. and Harasek, M.} } @conference {254, title = {Pore-forming additives in brick production and their behaviour in the burning process - first results of an ongoing investigation}, booktitle = {15th Minisymposium Verfahrenstechnik}, year = {2019}, month = {04/2019}, address = {Leoben, Austria}, author = {F. Wesenauer and C. Jordan and F. Birkelbach and M. Pichler and M. Harasek and F. Winter} } @conference {251, title = {Pulverized Coal Feeding Vessels - Characterization and Optimization}, booktitle = {AISTech 2019}, year = {2019}, month = {05/2019}, address = {Pittsburgh, PA, USA}, doi = {10.1000/377.042}, author = {B{\"o}senhofer, Markus and Antunes Paiva, In{\^e}s Isabel and Tjaden, Stefan and Jordan, Christian and Harasek, Michael and Rieger, Johannes and Feilmayr, Christoph and Hauzenberger, Franz} } @conference {252, title = {A Raceway Model Based on Open-Source Software}, booktitle = {AISTech 2019}, year = {2019}, month = {05/2019}, address = {Pittsburgh, PA, USA}, doi = {10.1000/377.272}, author = {B{\"o}senhofer, Markus and Wartha, Eva-Maria and Jordan, Christian and Harasek, Michael and Feilmayr, Christoph and Hauzenberger, Franz and K{\"o}nig, Bernhard} } @article {248, title = {Suitability of pulverised coal testing facilities for blast furnace applications}, journal = {Ironmaking \& Steelmaking}, year = {2019}, month = {Aug-01-2020}, pages = {1 - 12}, issn = {0301-9233}, doi = {10.1080/03019233.2019.1565152}, url = {https://www.tandfonline.com/doi/full/10.1080/03019233.2019.1565152}, author = {B{\"o}senhofer, Markus and Wartha, Eva-Maria and Jordan, Christian and Feilmayr, Christoph and Stocker, Hugo and Hauzenberger, Franz and Rieger, Johannes and Tjaden, Stefan and Walk, Arleen and Harasek, Michael} } @conference {225, title = {Characterization of Gas Phase Reaction Regime in the Raceway Zone}, booktitle = {AISTech 2018 Proceedings}, year = {2018}, address = {Philadelphia, PA, USA}, author = {B{\"o}senhofer, Markus and Wartha, Eva-Maria and Jordan, Christian and Harasek, Michael and Feilmayr, Christoph and Hauzenberger, Franz} } @inbook {215, title = {Computational Improvements for the Eddy Dissipation Concept by Operator Splitting and Tabulation}, booktitle = {Proceedings of the 28th European Symposium on Computer Aided Process Engineering}, volume = {43}, number = {2010}, year = {2018}, pages = {1687{\textendash}1692}, abstract = {

The Eddy Dissipation Concept (EDC) is a well working concept for turbulent reacting flows, which depicts the influence of chemical reactions as well as turbulence. The problem when using detailed chemical mechanisms - necessary for more information about radical species and pollutants - is the vastly increased computational demand. Operator splitting and in situ adaptive tabulation (ISAT) can be a way to reduce the computational effort and improve the application of detailed chemical mechanisms with the EDC. Two operator splitting mechanisms are presented and used for the simulation of Sandia Flame D. The computational time can be decreased and the results fit well to the experimental results.

}, keywords = {Eddy Dissipation Concept (EDC), in situ adaptive tabulation (ISAT), OpenFOAM, operator splitting, turbulent combustion}, isbn = {9780444642356}, issn = {15707946}, doi = {10.1016/B978-0-444-64235-6.50294-1}, author = {Wartha, Eva-Maria and B{\"o}senhofer, Markus and Harasek, Michael} } @article {216, title = {The Eddy Dissipation Concept{\textemdash}Analysis of Different Fine Structure Treatments for Classical Combustion}, journal = {Energies}, volume = {11}, year = {2018}, abstract = {

The Eddy Dissipation Concept (EDC) is common in modeling turbulent combustion. Several model improvements have been proposed in literature; recent modifications aim to extend its validity to Moderate or Intense Low oxygen Dilution (MILD) conditions. In general, the EDC divides a fluid into a reacting and a non-reacting part. The reacting part is modeled as perfectly stirred reactor (PSR) or plug flow reactor (PFR). EDC theory suggests PSR treatment, while PFR treatment provides numerical advantages. Literature lacks a thorough evaluation of the consequences of employing the PFR fine structure treatment. Therefore, these consequences were evaluated by employing tests to isolate the effects of the EDC variations and fine structure treatment and by conducting a Sandia Flame D modeling study. Species concentration as well as EDC species consumption/production rates were evaluated. The isolated tests revealed an influence of the EDC improvements on the EDC rates, which is prominent at low shares of the reacting fluid. In contrast, PSR and PFR differences increase at large fine fraction shares. The modeling study revealed significant differences in the EDC rates of intermediate species. Summarizing, the PFR fine structure treatment might be chosen for schematic investigations, but for detailed investigations a careful evaluation is necessary.

}, issn = {1996-1073}, doi = {10.3390/en11071902}, url = {http://www.mdpi.com/1996-1073/11/7/1902}, author = {B{\"o}senhofer, Markus and Wartha, Eva-Maria and Jordan, Christian and Harasek, Michael} } @article {217, title = {Engineering of three-dimensional pre-vascular networks within fibrin hydrogel constructs by microfluidic control over reciprocal cell signaling}, journal = {Biomicrofluidics}, volume = {12}, year = {2018}, doi = {10.1063/1.5027054}, author = {Bachmann, Barbara Eva-Maria and Spitz, Sarah and Rothbauer, Mario and Jordan, Christian and Purtscher, Michaela and Zirath, Helene and Schuller, Patrick and Eilenberger, Christoph and Ali, Syed Faheem and M{\"u}hleder, Severin and Oberbauer, Eleni and Harasek, Michael and Redl, Heinz and Holnthoner, Wolfgang and Ertl, Peter} } @conference {236, title = {Physical shape optimization for a three-dimensional ow using a sedimentation-erosion model and the lattice Boltzmann method}, booktitle = {EFMC12 - 12th European Fluid Mechanics Conference}, year = {2018}, address = {Vienna, Austria}, author = {J{\"a}ger, Stephan and Blacher, David and Harasek, Michael} } @conference {224, title = {Pulverized Coal Injection (PCI) Test Facilities and Methods - Overview and Recommendations}, booktitle = {AISTech 2018 Proceedings}, year = {2018}, address = {Philadelphia, PA, USA}, author = {B{\"o}senhofer, Markus and Jordan, Christian and Harasek, Michael and Feilmayr, Christoph and Hauzenberger, Franz and Walk, Arleen and Tjaden, Stefan} } @unpublished {234, title = {Radiation in particle clouds}, number = {1}, year = {2018}, address = {Vienna, Austria}, author = {B{\"o}senhofer, Markus and Jordan, Christian and Harasek, Michael} } @conference {239, title = {Radiative Heating of a Single Coal Particle Under Blast Furnace Conditions}, booktitle = {14th Minisymposium Chemical {\&} Process Engineering}, year = {2018}, isbn = {978-3-200-05641-1}, author = {B{\"o}senhofer, Markus and Jordan, Christian and Harasek, Michael} } @unpublished {229, title = {TUW-IVT and K1-MET - Cooperation Highlights}, number = {1}, year = {2018}, author = {Harasek, Michael and B{\"o}senhofer, Markus and Wartha, Eva-Maria and Jordan, Christian} } @unpublished {208, title = {CFD @ TU Wien}, year = {2017}, author = {Harasek, Michael and Haddadi, Bahram and Jordan, Christian and Harsfalvi, Zsolt and B{\"o}senhofer, Markus and Lukitsch, Benjamin and Wartha, Eva-Maria and Ecker, Paul and Pichler, Mario} } @conference {240, title = {Difficulties in the characterization of gas phase combustion regimes}, booktitle = {13th Minisymposium Chemical and Process Engineering}, year = {2017}, author = {B{\"o}senhofer, Markus and Jordan, Christian and Harasek, Michael} } @conference {199, title = {A Flame D Modelling Study Employing Eddy Dissipation Concept Modifications}, booktitle = {Digital Proceedings}, year = {2017}, isbn = {978-953-59504-1-7}, author = {B{\"o}senhofer, Markus and Jordan, Christian and Harasek, Michael} } @unpublished {235, title = {Multi-phase Reacting Flows in OpenFOAM{\textregistered}}, number = {14}, year = {2017}, author = {B{\"o}senhofer, Markus and Jordan, Christian and Harasek, Michael} } @conference {198, title = {The Relevance of Reaction Mechanisms in the CFD Modelling of Blast Furnaces}, booktitle = {Proceedings}, year = {2017}, author = {B{\"o}senhofer, Markus and Harasek, Michael and Jordan, Christian and Feilmayr, Christoph and Hauzenberger, Franz} } @conference {238, title = {Towards Generic Reactive Flow Modelling}, booktitle = {VSS 2017 - Vienna young Scientists Symposium}, year = {2017}, address = {Vienna, Austria}, isbn = {978-3-9504017-5-2}, author = {B{\"o}senhofer, Markus and Jordan, Christian and Harasek, Michael} } @conference {177, title = {Investigation of Alternative Reducing Agent Conversion in the Raceway Cavity of Blast Furnaces by Numerical Simulation}, booktitle = {Proceedings}, year = {2016}, author = {Harasek, Michael and Maier, Christian and Jordan, Christian and B{\"o}senhofer, Markus and Feilmayr, Christoph} } @article {151, title = {Determination of mixing quality in biogas plant digesters using tracer tests and computational fluid dynamics}, journal = {Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis}, volume = {140}, year = {2013}, pages = {1269{\textendash}1278}, doi = {10.11118/actaun201361051269}, author = {Kamarad, Ludek and Pohn, Stefan and Bochmann, G{\"u}nther and Harasek, Michael} } @article {47, title = {Numerical and Experimental Study of Alternative Reductant Injection into the Raceway of the Blast Furnace}, journal = {BHM Berg- und H{\"u}ttenm{\"a}nnische Monatshefte}, volume = {158}, year = {2013}, pages = {453{\textendash}454}, doi = {10.1007/s00501-013-0191-3}, author = {Maier, Christian and Jordan, Christian and Knepper, M. and Babich, A. and Senk, D. and Feilmayr, Christoph and Thaler, Christoph and Harasek, Michael} } @article {135, title = {Processing and simulation of few nm thick high-k dielectric films}, journal = {Microelectronic Engineering}, volume = {83}, year = {2006}, pages = {1571{\textendash}1572}, author = {Abermann, Stephan and Jordan, Christian and Harasek, Michael and Bertagnolli, Emmerich} } @conference {180, title = {CDF-Simulation of Mass Transfer Effects in Gas and Vapour Permeation Moduls}, booktitle = {ICOM 2002}, year = {2002}, author = {Staudacher, Max and Harasek, Michael and Brinkmann, Torsten and Hilgendorff, W and Friedl, Anton} } @article {166, title = {CFD-simulation of mass transfer effects in gas and vapour permeation modules}, journal = {Desalination}, volume = {146}, year = {2002}, pages = {237{\textendash}241}, author = {Staudacher, Max and Harasek, Michael and Brinkmann, Torsten and Hilgendorff, W and Friedl, Anton} } @conference {181, title = {CFD-Simulation of Membrane Modules in Gas and Vapor Permeation: Comparison of the Influence of different Geometries on Mass Transfer through Membranes}, booktitle = {Book of Abstracts}, year = {2002}, publisher = {Proceedings}, organization = {Proceedings}, author = {Staudacher, Max and Harasek, Michael and Brinkmann, Torsten and Hilgendorff, W and Friedl, Anton} } @article {24, title = {Fluiddynamische Simulation in der Membrantechnik}, year = {2001}, abstract = {

In Zusammenarbeit mit dem Institut f{\"u}r Chemie des HGF Forschungszentrums GKSS wurden mit Hilfe des Softwarepakets FLUENT Untersuchungen an Membranmodulen zur Gasaufbereitung vorgenommen. Der transmembrane Stofftransport wurde mit sogenannten {\quotedblbase}user defined functions{\textquotedblleft} (UDF) modelliert.

}, author = {Staudacher, Max and Harasek, Michael and Brinkmann, Torsten and Hilgendorff, Walter} }