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Thorsten Zirwes

Thorsten Zirwes

Building449
Room295
Phone+49 721 608-29278

E-Mailthorsten zirwesYar3∂kit edu
Scientific Computing and Simulation
Staff

Research

Combustion is still the most important energy source. Today, over 80 % of the world's primary energy consumption is supplied by fossil fuels [1] . In order to meet the climate goals despite the world's growing energy demands, it is important to increase the efficiency and reduce the pollutant emissions of future combustion systems. But this is only possible with a better understanding of the fundamental physical and chemical processes that underlie combustion.

An important technique for studying combustion processes is Computational Fluid Dynamics (CFD), where computers are used to perform numerical simulations. A special CFD method is the Direct Numerical Simulation (DNS). In DNS, no simplifications are used to model the complex combustion phenomena and the gas flow. Instead, the governing mathematical equations are solved directly. In order to do this, the simulation has to resolve all details that are relevant in the combustion: the (turbulent) flow field has to be resolved down to the smallest structures, which might be of the order of a few micrometers, while the computational domain my span meters. Additionally, the thin reactive layer of the flames, where most of the chemical reactions take place, has to be captured in detail as well. Detailed chemical reaction mechanisms have to be used, which can include tens of thousands of different chemical reactions for describing the combustion. This also constrains the temporal resolution of the simulations, because even the fastest reactions have to be considered.

Because of this, DNS of combustion is very computationally expensive and only possible to perform on supercomputers. We developed a DNS solver for turbulent flames in OpenFOAM [2] , which uses an optimized chemistry implementation and is coupled to Cantera [3]  in order to compute detailed molecular fluxes. Figure 1 shows scaling tests performed on the ForHLR II Cluster at the SCC and the Hazel Hen  Cluster at the HLRS. The results were obtained with OpenFOAM v1612+ on a computational grid with 176 million cells on up to 28800 CPU cores.

Figure 1: Scaling tests with OpenFOAM v1612+.
Source: Zirwes, T.; Zhang, F.; Denev, J.A.; Habisreuther, P.; Bockhorn, H. 2017. Automated Code Generation for Maximizing Performance of Detailed Chemistry Calculations in OpenFOAM. In High Performance Computing in Science and Engineering '17. Springer International Publishing

The results of DNS are very valuable because they allow to gain deeper insights in the mutual interaction between the flame and the fluid flow field, which is still not fully unterstood [4] . DNS can also be used to investigate phenomena which are not accessible through experiments. Figure 2 shows a 2D cut of the temperature field from a simulation of a model burner, which generates a flame where the fuel and oxidizer are only partially premixed. Figure 3 shows the heat release rate as well as a vorticity iso-surface to illustrate the highly turbulent flow in the central jet region.

Figure 2: Temperature field of a partially premixed flame.
Figure 3: Vorticity iso-surface colored by fluid velocity and heat release rate.

 

Publications

Zirwes, T., Zhang, F., Habisreuther, P., Hansinger, M., Bockhorn, H., Pfitzner, M., Trimis, D. Quasi-DNS Dataset of a Piloted Flame with Inhomogeneous Inlet Conditions, Flow, Turbulence and Combustion. 2019: doi: 10.1007/s10494-019-00081-5 (In Press) (link)

Zhang, F., Zirwes, T., Habisreuther, P., Zarzalis, N., Bockhorn, H., Trimis, D. Numerical Simulation of a Fan-Stirred Combustion Bomb at Elevated Pressure. Shock Waves. 2019 (Under Review)

Zirwes, T., Häber, T., Zhang, F., Steinhausen, M., Kosaka, H., Bockhorn, H. , Suntz, R., Hasse, C., Dreizler, A. Numerical and Experimental Investigation of Chemiluminescent Radical Concentrations During Side-Wall Quenching. International Workshop on Clean Combustion: Principles and Applications. 25.–26. September 2019

Zirwes, T., Zhang, F., Habisreuther, P., Hansinger, M., Bockhorn, H., Pfitzner, M. , Trimis, D. Identification of Flame Regimes in Partially Premixed Combustion from a Quasi-DNS Dataset. International Workshop on Clean Combustion: Principles and Applications. 25.–26. September 2019

Hansinger, M., Zirwes, T., Zips, J., Pfitzner, M., Zhang, F., Habisreuther, P., Bockhorn, H. The Eulerian Stochastic Fields method applied to Large Eddy Simulations of a piloted flame with inhomogeneous inlet. Flow, Turbulence and Combustion. 2019 (under review)

Soysal, M., Berghoff, M., Zirwes, T., Vef, M.A., Oeste, S., Brinkman, A., Nagel, W.E., Streit, A. Using On-demand File Systems in HPC Environments, Proceedings of the International Conference on High Performance Computing and Simulation. 2019 (link)

Zhang, F., Müller, T., Zirwes, T., Wachter, S., Jakobs, T., Habisreuther P., Zarzalis, N., Trimis, D., Kolb, T. Numerical and Experimental Investigation of Primary Breakup of High-Viscous Fluid at Elevated Pressure. Proceedings of the Conference on Liquid Atomization and Spray Systems. 2019 (link)

Zhang, F., Zirwes, T., Habisreuther, P., Zarzalis, N., Bockhorn, H., Trimis, D. Numerical Computation of Turbulent Flow Fields in a Fan-stirred Combustion Bomb. Combustion Science and Technology. GCST-2019-0096.R1. 2019; doi.org/10.1080/00102202.2019.1665520 (In Press) (link)

Zirwes, T., Sebbar, N., Habisreuther, P., Harth, S., Zhang, F., Bockhorn, H., Trimis, D. Ignition behaviour of sulfur in air based on modified reaction kinetics. 11th Mediterranean Combustion Symposium. 2019

Zhang, F., Zirwes, T., Habisreuther, P., Zarzalis, N., Bockhorn, H., Trimis, D. Numerical Simulation of Turbulent Flame Propagation in a Fan-Stirred Combustion Bomb at Elevated Pressures. 27th International Colloquium on Detonation. Explosion and Reactive Systems (ICDERS). 2019

Zirwes, T., Zhang, F., Denev, J.A., Habisreuther, P., Bockhorn, H., Trimis, D. Enhancing OpenFOAM’s Performance on HPC Systems. in: Nagel, W.E., Kröner, D.H., Resch, M.M. High Performance Computing in Science and Engineering ’19. Springer. 2019 (In Press)

Zhang, F., Heidarifatasmi, H., Harth, S., Zirwes, T., Fedoryk, M., Sebbar, N., Trimis, D. Numerical Investigation of a Sulfur Combustor. 29. Deutscher Flammentag. Deutsche Sektion des Combustion Institutes und DVV/VDI-Gesellschaft Energie und Umwelt. 2019

Tavakkol, S., Zirwes, T., Denev, J.A., Weber, N., Bockhorn, H. Development and validation of an Euler-Lagrange method for the numerical simulation of wet-biomass carbonization in a rotary kiln reactor. 29. Deutscher Flammentag. Deutsche Sektion des Combustion Institutes und DVV/VDI-Gesellschaft Energie und Umwelt. 2019

Zhang, F., Müller, T., Zirwes, T., Wachter, S., Jakobs, T., Habisreuther, P., Zarzalis, N., Trimis, D., Kolb, T. Effect of elevated pressure on primary jet-breakup: Basic research for entrained flow gasification. 29. Deutscher Flammentag. Deutsche Sektion des Combustion Institutes und DVV/VDI-Gesellschaft Energie und Umwelt. 2019

Zirwes, T., Zhang, F., Habisreuther, P., Bockhorn, H., Trimis, D. Large-Scale Quasi-DNS of Mixed-Mode Turbulent Combustion. Proceedings in Applied Mathematics & Mechanics (PAMM). Wiley. 2019. ISSN: 1617-7061 (In Press)

Zirwes, T., Häber, T., Zhang, F., Kosaka, H., Bockhorn, H., Suntz, R., Dreizler, A., Janicka, J. 2D and 3D numerical simulation of chemiluminescent radical concentrations during side-wall quenching of premixed methane and propane flames. Proceedings of the European Combustion Meeting. 2019. S3_AIII_47

Zhang, F., Heidarifatasmi, H., Zirwes, T., Fedoryk, M., Harth, S., Sebbar, N., Habisreuther, P., Trimis, D., Bockhorn, H. Numerical simulation of sulfur combustors with high-power-density, Proceedings of the European Combustion Meeting 2019, S2_AIII_57 (2019)

Denev, J.A., Naydenova, I., Zhang, F., Zirwes, T., Bockhorn, H. Unsteady pure straining effects on lean premixed flames of different Lewis numbers. Proceedings of the European Combustion Meeting. 2019. S4_AIII_37 (2019)

Zirwes, T., Zhang, F., Denev, J.A., Habisreuther, P., Bockhorn, H., Trimis, D. Improved Vectorization for Efficient Chemistry Computations in OpenFOAM for Large Scale Combustion Simulations. in: Nagel, W.E., Kröner, D.H., Resch, M.M. High Performance Computing in Science and Engineering ’18. Springer. 2018: 209–224; doi:10.1007/978-3-030-13325-2_130 (link)

Zhang, F., Zirwes, T., Habisreuther, P., Bockhorn, H., Trimis, D., Nawroth, H., Paschereit, C.O. Impact of Combustion Modeling on the Spectral Response of Heat Release in LES. Combustion, Science and Technology. 2018. 191 (9): 1520–1540; doi:10.1080/00102202.2018.1558218 (link)

Zirwes, T., Zhang, F., Habisreuther, P., Denev, J.A., Bockhorn, H., Trimis, D. Optimizing Load Balancing of Reacting Flow Solvers in OpenFOAM for High Performance Computing. Proc. of 6th ESI OpenFOAM User Conference. ESI-OpenCFD. 6: 1–13 (link)

Sebbar, N., Zirwes, T., Habisreuther, T., Bozzelli, J. W., Bockhorn, H., Trimis, D. S2 Air Combustion: Reaction Kinetics, Flame Structure and Laminar Flame Behavior. Energy Fuels. 2018. 32 (10): 10184–10193; doi:10.1021/acs.energyfuels.8b01019 (link)

Zirwes, T., Zhang, F., Denev, J.A., Habisreuther, P., Bockhorn, H., Trimis, D. Detailed Transport and Performance Optimization for Massively Parallel Simulations of Turbulent Combustion with OpenFOAM. The 13th OpenFOAM Workshop. 2018. 20-041 (link)

Zhang, F., Zirwes, T., Habisreuther, P., Zarzalis, N., Trimis, D., Bockhorn, H. Large Eddy Simulation of Turbulent Flow in a Fan-stirred Combustion Vessel. 41st Meeting of the Italian Section of The Combustion Institute. German and Italian Sections of The Combustion Institute. 2018. I10; ISBN: 978-88-88104-22-5 (link)

Zhang, F., Zirwes, T., Nawroth, H., Li, N., Habisreuther, P., Bockhorn, H., Trimis, D., Paschereit, C.O. Spectral Response of Different Combustion Models in LES of Direct Combustion Noise. 41st Meeting of the Italian Section of The Combustion Institute. German and Italian Sections of The Combustion Institute. 2018. I8; ISBN: 978-88-88104-22-5 (link)

Sebbar, N., Zirwes, T., Habisreuther, P., Bockhorn, H., Trimis, D. Investigation of S2 + Air Combustion. German and Italian Sections of the Combustion Institute. 41st Meeting of the Italian Section of The Combustion Institute. 2018. I10; ISBN: 978-88-88104-22-5 (link)

Zirwes, T., Zhang, F., Denev, J.A., Habisreuther, P., Bockhorn, H. Automated Code Generation for Maximizing Performance of Detailed Chemistry Calculations in OpenFOAM. in: Nagel, W.E., Kröner, D.H., Resch, M.M. High Performance Computing in Science and Engineering ’17. Springer. 2018: 189–204; doi:10.1007/978-3-319-68394-2_11 (link)

Zirwes, T., Zhang, F., Häber, T., Bockhorn, H. Ignition of combustible mixtures by hot particles at varying relative speeds. Combustion Science and Technology. 2018. 191 (1): 178–195; doi:10.1080/00102202.2018.1435530 (link)

Zirwes, T., Zhang, F., Denev, J.A., Habisreuther, P., Bockhorn, H., Zarzalis, N. Effect of Elevated Pressure on the Flame Response To Stretch of Premixed Flames. 28. Deutscher Flammentag. 2017. VDI-Berichte 2302: 549–561; ISBN 978-3-18-092302-4 (2017)

Zirwes, T., Zhang, F., Häber, T., Roth, D., Bockhorn, H. Direct numerical simulation of ignition by hot moving particles. 26th International Colloquium on the Dynamics of Explosions and Reactive Systems. 2017. 1121 (link)

Zirwes, T., Zhang, F., Denev, J., Habisreuther, P., Bockhorn, H., Zarzalis, N. Response of Local and Global Consumption Speed to Stretch in Laminar Steady-State Flames. Proceedings of the 8th European Combustion Meeting. 2017. ECM2017.0379 (link)

Häber, T., Zirwes, T., Roth, D., Zhang, F., Bockhorn, H., Maas, U. Numerical Simulation of the Ignition of Fuel/Air Gas Mixtures Around Small Hot Particles. Zeitschrift für Physikalische Chemie. 2017. 231(10): 1625–1654; doi:10.1515/zpch-2016-0933 (link)

Zhang, F., Zirwes, T., Habisreuther, P., Bockhorn, H. Towards Reduction of Computational Cost for Large-Scale Combustion Modeling with a Multi-Regional Concept. Progress in Computational Fluid Dynamics. 2017. 18 (6): 333–346; doi:10.1504/PCFD.2018.096616 (link)

Zhang, F., Zirwes, T., Habisreuther, T., Bockhorn, H. Effect of unsteady stretching on the flame local dynamics. Combustion and Flame. 2016. 175: 170–179; doi:10.1016/j.combustflame.2016.05.028 (link)

Zhang, F., Baust, T., Zirwes, T., Denev, J., Habisreuther, P., Zarzalis, N., Bockhorn, H. Impact of infinite thin flame approach on the evaluation of flame speed using spherically expanding flames. Energy Technology. 2016 5 (7): 1055–1063; doi:10.1002/ente.201600573 (link)

Zhang, F., Zirwes, T., Nawroth, H., Habisreuther, P., Bockhorn, H., Paschereit, C.O. Combustion generated noise: an environment related issue for future combustion systems. Energy Technology. 2016. 5 (7): 1045–1054; doi:10.1002/ente.201600526 (link)

Zhang, F., Zirwes, T., Habisreuther, P., Bockhorn, H. A DNS Analysis of the Evaluation of Heat Release Rates from Chemiluminescence Measurements in Turbulent Combustion. in: Nagel, W.E., Kröner, D.H., Resch, M.M. High Performance Computing in Science and Engineering ’16, Springer. 2016: 229–243; doi:10.1007/978-3-319-47066-5_16 (link)

Zhang, F., Zirwes, T., Habisreuther, P., Bockhorn, H. Numerical Simulation of Turbulent Combustion with a Multi-Regional Approach. in: Nagel, W.E., Kröner, D.H., Resch, M.M. High Performance Computing in Science and Engineering ’15. Springer. 2015: 267–280; doi:10.1007/978-3-319-24633-8_18 (link)

Zhang, F., Bonart, H., Zirwes, T., Habisreuther, P., Bockhorn, H., Zarzalis, N. Direct Numerical Simulation of Chemically Reacting Flows with the Public Domain Code OpenFOAM. in: Nagel, W.E., Kröner, D.H., Resch, M.M. High Performance Computing in Science and Engineering ’14. Springer. 2014: 221–236; doi:10.1007/978-3-319-10810-0_16 (link)

See also HERE

Presentations and Posters

Tavakkol, S., Weber, N., Zirwes, T., Denev, J., Bockhorn, H. Performance of large scale Eulerian-Lagrangian numerical simulation for particulate flow in rotating reactors. bwHPC Symposium. 30. September 2019. Karlsruhe. Germany (Presentation)

Zirwes, T., Zhang, F., Denev, J.A., Habisreuther, P., Bockhorn, H., Trimis, D. Enhancing OpenFOAM’s Performance on HPC Systems. 22nd HLRS Results and Review Workshop at HLRS. 7.–8. October 2019. Stuttgart. Germany (Poster)

Zirwes, T., Häber, T., Zhang, F., Steinhausen, M., Kosaka, H., Bockhorn, H., Suntz, R., Hasse, C., Dreizler, A. Numerical and Experimental Investigation of Chemiluminescent Radical Concentrations During Side-Wall Quenching. International Workshop on Clean Combustion: Principles and Applications. 25.–26. September 2019. Darmstadt. Germany (Poster)

Zirwes, T., Zhang, F., Habisreuther, P., Hansinger, M., Bockhorn, H., Pfitzner, M., Trimis, D. Identification of Flame Regimes in Partially Premixed Combustion from a Quasi-DNS Dataset. International Workshop on Clean Combustion: Principles and Applications, 25.–26. September 2019. Darmstadt. Germany (Poster)

Zirwes, T., Zhang, F., Habisreuter, P., Bockhorn, H., Trimis, D. Effect of Transient Flame Stretch. 22. September 2019. Technical University Darmstadt. Simulation of reactive Thermo-Fluid Systems (STFS). Darmstadt. Germany (Presentation)

Zirwes, T., Zhang, F., Habisreuter, P., Bockhorn, H., Trimis, D. Quasi-DNS of the Partially Premixed Sydney Flame. 22. September 2019. Technical University Darmstadt. Simulation of reactive Thermo-Fluid Systems (STFS). Darmstadt. Germany (Presentation)

Zhang, F., Heidarifatasmi, H., Harth, S., Zirwes, T., Fedoryk, M., Sebbar, N., Trimis, D. Numerical Investigation of a Sulfur Combustor. 29. Deutscher Flammentag. 17.–18. September 2019. Bochum. Germany (Presentation)

Tavakkol, S., Zirwes, T., Denev, J.A., Weber, N., Bockhorn, H. Development and validation of an Euler-Lagrange method for the numerical simulation of wet-biomass carbonization in a rotary kiln reactor. 29. Deutscher Flammentag, 17.–18. September 2019. Bochum. Germany (Presentation)

Zhang, F., Müller, T., Zirwes, T., Wachter, S., Jakobs, T., Habisreuther, P., Zarzalis, N., Trimis, D., Kolb, T. Effect of elevated pressure on primary jet-breakup: Basic research for entrained flow gasification. 29. Deutscher Flammentag. 17.–18. September 2019. Bochum (Presentation)

Zhang, F., Müller, T., Zirwes, T., Wachter, S., Jakobs, T., Habisreuther, P., Zarzalis, N., Trimis, D., Kolb, T. Numerical and Experimental Investigation of Primary Breakup of High-Viscous Fluid at Elevated Pressure. Conference on Liquid Atomization and Spray Systems, 2.–4. September 2019. Paris. France (Presentation)

Zhang, F., Zirwes, T., Habisreuther, P., Zarzalis, N., Bockhorn, H., Trimis, D. Numerical Simulation of Turbulent Flame Propagation in a Fan-Stirred Combustion Bomb at Elevated Pressures. 27th International Colloquium on Detonation. Explosion and Reactive Systems (ICDERS). 28. July – 2. August 2019. Beijing. China (Presentation)

Soysal, M., Berghoff, M., Zirwes, T., Vef, M.A., Oeste, S., Brinkman, A., Nagel, W.E., Streit, A. Using On-demand File Systems in HPC Environments. International Conference on High Performance Computing and Simulation (HPBench@HPCS). 15.–19. July 2018. Dublin. Ireland 2019. (Presentation)

Zirwes, T., Sebbar, N., Habisreuther, P., Harth, S., Zhang, F., Bockhorn, H., Trimis, D. Ignition behaviour of sulfur in air based on modified reaction kinetics. 11th Mediterranean Combustion Symposium. 16.–20. June 2019. Tenerife. Spain (Presentation)

Zirwes, T., Zhang, F., Habisreuther, P., Bockhorn, H., Trimis, D. Spectral response of heat release in LES combustion modeling. Seventeenth International Conference on Numerical Combustion. MS8-208. 6.–8. May 2019. Aachen. Germany (Presentation)

Zhang, F., Zirwes, T., Habisreuther, P., Bockhorn, H., Trimis, D. LES of combustion noise from a turbulent premixed jet flame. Seventeenth International Conference on Numerical Combustion. MS8-210. 6.–8. May 2019. Aachen. Germany (Presentation)

Zirwes, T., Zhang, F., Habisreuther, P., Denev, J.A., Bockhorn, H., Trimis, D. HPC Implementation of Flame Particle Tracking for Studying Laminar and Turbulent Flame Dynamics. Seventeenth International Conference on Numerical Combustion. 242, 6.–8. May 2019. Aachen. Germany (Presentation)

Zirwes, T., Häber, T., Zhang, F., Kosaka, H., Bockhorn, H., Suntz, R., Dreizler, A., Janicka, J. 2D and 3D numerical simulation of chemiluminescent radical concentrations during side-wall quenching of premixed methane and propane flames. European Combustion Meeting. S3_AIII_47. 14.–17. April 2019. Lisboa. Portugal (Poster)

Zhang, F., Heidarifatasmi, H., Zirwes, T., Fedoryk, M., Harth, S., Sebbar, N., Habisreuther, P., Trimis, D., Bockhorn, H. Numerical simulation of sulfur combustors with high-power-density. European Combustion Meeting. S2_AIII_57. 14.–17. April 2019. Lisboa. Portugal (Poster)

Denev, J.A., Naydenova, I., Zhang, F., Zirwes, T., Bockhorn, H. Unsteady pure straining effects on lean premixed flames of different Lewis numbers. European Combustion Meeting. S4_AIII_37. 14.–17. April 2019. Lisboa. Portugal (Poster)

Fedoryk, M., Zhang, F., Heidarifatasmi, H., Zirwes, T., Sebbar, N., Harth, S., Trimis, D. Entwicklung von Schwefelbrennern mit hohen Leistungsdichten. Jahrestreffen der ProcessNet Fachgruppe Hochtemperaturtechnik. P5, 2.–3. April 2019. Karlsruhe. Germany (Poster)

Zirwes, T., Zhang, F., Habisreuther, P., Bockhorn, H., Trimis, D. Large-Scale Quasi-DNS of Mixed-Mode Turbulent Combustion. Book of Abstracts of the 90th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM2019). 90: 325; ISBN 978-3-903024-84-7, 18.–20. February 2019. Vienna. Austria (Presentation)  (link)

Zirwes, T., Zhang, F., Habisreuther, P., Denev, J.A., Bockhorn, H., Trimis, D. Optimizing Load Balancing of Reacting Flow Solvers in OpenFOAM for High Performance Computing. 6th ESI OpenFOAM User Conference. ESI-OpenCFD. 17.–19. October 2018. Hamburg. Germany (Presentation)

Zirwes, T., Zhang, F., Denev, J.A., Habisreuther, P., Bockhorn, H., Trimis, D. Improved Vectorization for Efficient Chemistry Computations in OpenFOAM for Large Scale Combustion Simulations. 21st HLRS Results and Review Workshop. 4.–5. October 2018. Stuttgart. Germany (Poster)

Zirwes, T., Zhang, F., Habisreuther, P., Denev, J.A., Bockhorn, H., Trimis, D. Highly Resolved Numerical Simulation of Regime Transition in Mixed-Mode Flames. 37th International Symposium on Combustion. 1P116, 29. July – 3. August 2018. Dublin. Ireland (Poster)

Zirwes, T., Zhang, F., Denev, J.A., Habisreuther, P., Bockhorn, H., Trimis, D. Detailed Transport and Performance Optimization for Massively Parallel Simulations of Turbulent Combustion with OpenFOAM. The 13th OpenFOAM Workshop. 24.–29. June 2018. Shanghai. China (Presentation)

Zhang, F., Zirwes, T., Habisreuther, P., Zarzalis, N., Trimis, D., Bockhorn, H. Spectral Response of Different Combustion Models in LES of Direct Combustion Noise. 41st Meeting of the Italian Section of The Combustion Institute. 23.–26. May 2018. Sorrento. Italy (Presentation)

Zhang, F., Zirwes, T., Habisreuther, P., Bockhorn, H., Trimis, D., Nawroth, H., Paschereit, C.O. Large Eddy Simulation of Turbulent Flow in a Fan-Stirred Combustion Vessel. 41st Meeting of the Italian Section of The Combustion Institute. 23.–26. May 2018. Sorrento. Italy (Presentation)

Sebbar, N., Zirwes, T., Habisreuther, P., Bockhorn, H., Trimis, D. Investigation of S2 + Air Combustion. 41st Meeting of the Italian Section of The Combustion Institute. 23.–26. May 2018. Sorrento. Italy (Poster)

Zirwes, T., Zhang, F., Habisreuther, P., Denev, J.A., Bockhorn, H., Trimis, D. Database and Prediction of the Regime Transition for the Sandia/Sydney Mixed-Mode Flame. Combustion-DNS Strategy & Data Analysis Workshop. 22.–23. May 2018. Sorrento. Italy (Poster)

Zirwes, T., Zhang, F., Habisreuther, P., Denev, J.A., Bockhorn, H., Trimis, D. A Reliability Assessment of Highly Resolved Numerical Simulation for Turbulent Combustion. Combustion-DNS Strategy & Data Analysis Workshop. 22.–23. May 2018. Sorrento. Italy (Poster)

Zirwes, T., Zhang, F., Denev, J.A., Habisreuther, P., Bockhorn, H., Trimis, D. Generation of a Database with Detailed Numerical Simulation of Mixed-Mode Combustion. NIC Symposium. ST 6. 22.–23. February 2019. Jülich. Germany (Poster)

Zirwes, T., Zhang, F., Denev, J.A., Habisreuther, P., Bockhorn, H. Automated Code Generation for Maximizing Performance of Detailed Chemistry Calculations in OpenFOAM. 20th Results and Review Workshop of the HLRS. 5.–6. October 2017. Stuttgart. Germany (Presentation)

Zirwes, T., Zhang, F., Denev J.A., Habisreuther, P., Bockhorn, H., Zarzalis, N. Effect of Elevated Pressure on the Flame Response To Stretch of Premixed Flames. 28. Deutscher Flammentag. 6.–7. September 2017. Darmstadt. Deutschland (Presentation)

Zirwes, T., Zhang, F., Häber, T., Roth, D., Bockhorn, H. Direct numerical simulation of ignition by hot moving particles. 26th International Colloquium on the Dynamics of Explosions and Reactive Systems. 30. July – 4. August 2017. Boston. USA (Presentation)

Zirwes, T., Zhang, F., Denev, J., Habisreuther, P., Bockhorn, H., Zarzalis, N. Response of Local and Global Consumption Speed to Stretch in Laminar Steady-State Flames. European Combustion Meeting. 18.–21. April 2017. Dubrovnik. Croatia (Poster)

Zirwes, T., Zhang, F., Habisreuther, P., Bockhorn, H. A DNS Analysis of the Correlation of Heat Release Rate with Chemiluminescence Emissions in Turbulent Combustion. The 19th Results and Review Workshop of the HLRS. 13.–14. October 2016. Stuttgart. Deutschland (Presentation)

Zhang, F., Zirwes, T., Habisreuther, P., Bockhorn, H., Nawroth, H., Paschereit, CO. LES and DNS of Combustion and Combustion Generated Noise. 2nd Colloquium on Combustion Dynamics and Noise. 19.–22. September 2016. Menaggio. Italy (Presentation)

Zirwes, T., Zhang, F., Habisreuther, P., Bockhorn, H. Flame Response to Unsteady Stretching. 36th International Symposium on Combustion. 31. July – 5. August 2016. Seoul. Korea (Poster)

Zirwes, T., Zhang, F., Habisreuther, P., Bockhorn, H. Identification of correlation between OH* chemiluminescence and heat release rate with direct numerical simulation. NIC Symposium. 11.–12. February 2016. Forschungszentrum Jülich. Germany (Poster)

Zirwes, T., Zhang, F., Habisreuther, P., Bockhorn, H. Numerical Simulation of Turbulent Combustion with a Multi-Regional Approach. 18th Results and Review Workshop at the HLRS. 5. October 2015. Stuttgart. Germany (Presentation)

Zhang, F., Zirwes, T., Habisreuther, P., Bockhorn, H., Nawroth, H., Paschereit, C.O. Direct combustion noise of premixed flames: experiments and simulation using compressible LES and DNS. Sixteenth International Conference on Numerical Combustion. 19.–22. April 2015. Avignon. France (Poster)

Zhang, F., Bonart, H., Zirwes, T., Habisreuther, P., Bockhorn, H., Zarzalis, N. Direct Numerical Simulation of Chemically Reacting Flows with the Public Domain Code OpenFOAM. 17th Results and Review Workshop at the HLRS. 29. September 2014. Stuttgart. Germany (Presentation)

Zhang, F., Bonart, H., Zirwes, T., Habisreuther, P., Bockhorn, H. On Direct Numerical Simulation of Turbulent Combustion with OpenFOAM. NIC Symposium, 12.–13. February 2014. Forschungszentrum Jülich. Germany (Poster)

 

See also HERE

Miscellaneous

Zirwes, T., Zhang, F., Bonart, H., Habisreuther, P., Bockhorn, H. EBI-DNS Solver: An open-source extension for OpenFOAM for performing direct numerical simulation with detailed diffusion models. published and available for download on the Engler-Bunte-Institute website of KIT. 2019 (link)

Zirwes, T., Zhang, F., Habisreuther, P., Denev, J.A., Bockhorn, H. Automated Code Generation for Maximizing Performance of Detailed Chemistry Calculations in OpenFOAM. InSiDE. Spring 2018. Innovatives Supercomputing in Deutschland. 2018 (link)

Zirwes, T. Effiziente Rechenlastverteilung für die Simulation von Turbulenter Verbrennung auf Supercomputern (Efficient load balancing for the simulation of turbulent combustion on supercomputers). Steinbuch Centre for Computing (SCC) News. 2018. 2: 28–30 (link)

Zhang, F., Zirwes, T. Numerische Simulation turbulenter Verbrennung auf Hochleistungsrechnern des SCC (Numerical simulation of turbulent combustion on high performance computers at SCC). Steinbuch Centre for Computing (SCC) News. 2017. 1: 18–20 (link)

Zirwes, T. Effect of stretch on the burning velocity of laminar and turbulent premixed flames, Master’s thesis, Karlsruhe Institute of Technology (KIT). Karlsruhe. Germany. 2016; doi:10.5445/IR/1000094585 (link)

Zirwes, T. Optimierung einer Simulationssoftware für Verbrennungsprozesse (Optimization of a simulation software for combustion processes). DVGW energie | wasser-praxis, wvgw Wirtschafts- und Verlagsgesellschaft Gas und Wasser mbH. 2015. Ausgabe 03/15: 70–72 (link)

Zirwes, T. Weiterentwicklung und Optimierung eines auf OpenFOAM basierten DNS Lösers zur Verbesserung der Effizienz und Handhabung (Development and optimization of an OpenFOAM-based DNS solver for improving performance and handling). Bachelor’s thesis. Karlsruhe Institute of Technology (KIT). Karlsruhe. Germany. 2013; doi:10.5445/IR/1000037538 (link)

Awards & Honors

October 2018: Best Paper Award

at the 6th ESI OpenFOAM conference in Hamburg (Germany) (link)

May 2018: Best Presentation Award

Joint Meeting of the German and Italian Sections of the Combustion Institute, 41st Meeting on Combustion, Sorrento, May 2018 (link)

February 2018: KHYS Internship Grant

Internship program with Beijing University, China
    

October 2017: Golden Spike Award

High Performance Computing Center Stuttgart (HLRS). Awarded for Scientific relevance (top in their research field) and optimal usage of HPC equipment in terms of optimization, parallelization and overall performance. (link)

July 2016: Master (Summa cum Laude)

Master in Chemical Engineering and Process Engineering at the Karlruhe Institute of Technology.
        

June 2015: Scholarship from the Manfred Lautenschläger Foundation

for “Scientific Excellence“ in the MINT field.

September 2014: Student Award from the DVGW

for the best Bachelor’s thesis on gas fuels awarded by the “Deutscher Verein des Gas- und Wasserfaches” (DVGW). (link)