Simulation of Reactive Thermo-Fluid Systems
At the Institute for the Simulation of Reactive Thermo-Fluid Systems (STFS), we develop models and conduct simulations of sustainable energy systems.
Our mission
To power a sustainable world, our research focuses on chemical energy carriers and exploits the potential of renewable fuels such as hydrogen, ammonia, methanol, iron and aluminum. We develop advanced modeling approaches and simulation techniques for chemically reactive laminar and turbulent multicomponent and multiphase flows. We use these simulation techniques to investigate combustion processes on all scales: from the smallest structures of the reaction zone and the formation of nanoparticles in solid fuel flames to the largest scales of of technically relevant combustion chambers.
The work of our research group is characterized by a close connection between fundamental and application-oriented research. Our aim is to understand the physical principles of combustion through direct numerical simulations (DNS) and to combine this knowledge in advanced mathematical models. By coupling these models with scale-resolving large-eddy simulations (LES), we can investigate even very complex practical applications such as aircraft engines, industrial furnaces and chemical reactors.
To achieve our goals, we work closely with colleagues, especially experimentalists, from science and industry.
Prof. Dr.-Ing. Christian Hasse,
Head of STFS
In our research, we investigate clean energy conversion processes. With simulations on high-performance computers, we gain detailed insights into reactive flows that were unthinkable just a few years ago. In doing so, we bridge the gap between basic research and technical applications.
News from STFS
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42 — maybe we already have the answer, we're just missing the question
August 10, 2026
At the Gala Dinner of the 41st International Symposium on Combustion in Kyoto, I found my seat at table 42.
As a big fan of Douglas Adams' The Hitchhiker's Guide to the Galaxy, I could not let that pass. In the book, a supercomputer spends 7.5 million years calculating that the Answer to Life, the Universe, and Everything is 42, only for everyone to realize that nobody actually knew the question.
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Watching independence come full circle
August 06, 2026
appointed Professor at TU Darmstadt
I have worked with Arne Scholtissek since his very first Bachelor's thesis. When I moved from TU Bergakademie Freiberg to Technische Universität Darmstadt, Arne came with me, and over the years he built his own, independent line of research, step by step. Now he has been appointed Professor at TU Darmstadt.
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Speaking on Metal Combustion — at the Place Where the Kyoto Protocol Was Adopted
Juli 28, 2026
Topical Review Lecture at the 41st International Symposium on Combustion
I had the great honor of giving the Topical Review Lecture that opened the Emerging Fuels mini-symposium at the 41st International Symposium on Combustion — and it took place in the very same Kyoto International Conference Center where the Kyoto Protocol was adopted in 1997, a defining moment in the fight against the climate crisis.
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Science is beautiful — truly beautiful, almost like art.
April 08, 2026
2nd ERCOFTAC Milton van Dyke Competition
I am very honored to be a co-author of our submission to the 2nd ERCOFTAC Milton van Dyke Competition, which has been selected as one of the five finalists. Our contribution combines high-resolution experiments and large-eddy simulations side by side, showing the ignition of a turbulent iron particle-laden jet in a hot co-flow.
Introduction to the institutes RSM & STFS at the TU Darmstadt
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