Chair of Fluid Dynamics

The team develops and tests methods for the simulation and optimization of reactive flows and flames in installations such as heavy-duty gas turbines, nanoparticle synthesis reactors, piston engines or biomass- and pulverised coal furnaces. Our methods allow for shortened development times to further reduce costs. Our research helps to develop cost-effective, flexible and safe systems which emit fewer pollutants.

The complex processes in synthesis reactors and combustors require a detailed numerical characterisation of reaction and transport processes. Their simulation provides insights into areas, which are inaccessible to experiments, enables the investigation and comprehension of isolated subprocesses, and their interactions, and helps to bridge the gap between lab and industrial scale. For this purpose we develop and implement numerical models and methods which are necessary to describe and simulate turbulent combustion of multiphase flows as well as reaction kinetics.

Our work is financed by the state of North Rhine-Westphalia, the German Research Foundation (DFG), the Federal Ministry of Economics and Technology (BMWi), the Alliance for industrial research (AiF), national and international supercomputing centres as well as multiple private companies.

At the University of Duisburg-Essen, our group is closely linked with other groups at CeNIDE (Center for Nano-Integration Duisburg-Essen), CER.UDE (Center for Energy Research) and CCSS (Center for Computational Sciences and Simulation). As a menber of the IVG, we provide detailed simulation results and utilize data from the experiments of the other groups, which are essential for us.

The study at the chair imparts competences in the fields of flow simulation, in the description of reacting flows and in turbulence modeling.

NEWS

09.06.2020 Publication accepted in Proceedings of the Combustion Institute

 

An efficient method to correct the overestimated species predictions in thickened flame models is presented. This work is a collaboration between the University Duisburg-Essen and the Université Paris-Saclay.

08.06.2020 Publication accepted in Combustion Science and Technology

 
In this work, a lean premixed high pressure jet flame is investigated by LES. Simulations using different combustion models are compared with the experimental data and the pollutant formation of carbon monoxide and nitrogen oxide, as well as the stabilization of the flame is analyzed.

05.06.2020

 

Mourning for
Prof. Mário Costa

 

It is with great sadness that we have learned about the death of our friend and colleague Prof. Mário Costa.

His knowledge, support and friendship will always be remembered.

 

 

 

05.06.2020 Publication accepted in Combustion and Flame


Detailed one-dimensional calculations of transient laminar stratified flames in an unstrained state are presented. The stratification is achieved by changing the fuel-air ratio at the inlet by means of a sine function. This work was carried out in cooperation with Newcastle University within the framework of DFG funding.

05.06.2020 Exam in Strömungslehre 2 / Fluid Dynamics (WiSe 19/20)


The exam in Strömungslehre 2 / Fluid Dynamics (WiSe 19/20) was rescheduled:

Date:
Tuesday, 9th June 2020
from 10:30 am - 12:30 pm

Venue:
LA 0034: Students with family name from A - K
LX 1205: Students with family name from L - Z

No exams take place in LX 1203 and LA Mensa!

 

02.06.2020 Viewing examination papers Fluid Mechanics 1 (WS 19/20)


Due to the corona crisis, the viewing of the examination papers in Fluid Mechanics 1 will be postponed until further notice. In justified emergencies (when a failed exam prolongs the end of studies) an exception can be made. Please make an appointment with Dominik Meller dominik.meller [at] uni-due.de. The viewing will then be carried out for you at an agreed time in a large room, at the Duisburg campus. All people attending the session must wear face masks that cover the nose and mouth.

30.04.2020 2020 Bernard Lewis Fellowship for the 38th International Symposium on Combustion

Our former PhD student and postdoc, Dr. Martin Rieth, will be awarded a Bernard Lewis Fellowship for the 38th International Symposium on Combustion. The fellowship is awarded every two years by the Combustion Institute to young scientists for their high quality research. We are very pleased about this success - Congratulations, Martin!

17.04.20 COVID19 - News about our courses

 

Dear students,

COVID-19 forces us to use electronic means for teaching our classes. This is not ideal as it will lead to a very poor, hardly interactive experience - we are disappointed and sorry for the inconvenience this may cause. For “Strömungslehre 1”, “Fluidmechanics 1", and "Numerics and Flow Simulation", we have decided on the following approach:
 

Continue here

09.03.2020 Publication accepted in Fuel

 

In cooperation with the ETH Zurich, a study on "Particle History from Massively Parallel Large Eddy Simulations of Pulverised Coal Combustion in a Large-Scale Laboratory Furnace" was performed.

21.10.2019 Publication in International Journal of Heat and Fluid Flow

 

In cooperation with the University of the Federal Armed Forces in Munich and Keio University under the direction of Markus Klein, a promising scale similarity model for LES calculation was presented and extensively tested. The parameter-free model shows good results in single-phase and multi-phase test cases with low computational effort. Especially in free flows the model outperforms known eddy viscosity approaches.

06.09.2019 Publication accepted in Chemical Enginnering Science

 

A collaborative work as a combination of the simulation, experiment, and theoretical quantum chemical calculation resulted in a paper accepted in chemical engineering science journal. In this study,a chemical reaction mechanism is developed for the oxidation of Tetramethylsilane (TMS) as a precursor in a lean low-pressure (p ≈ 30 mbar) H2/O2/Ar flame using species mole fractions, obtained from molecular-beam mass spectrometry (MBMS) measurements in a matrix-supported flat flame doped with 600 ppm TMS as a starting point.

Chem. Eng. Sci. 115209 (2019)

23.08.2019 New publication on the SpraySyn burner

 

Collaboration between several IVG members resulted in a paper recently published in the Review of Scientific Instruments journal. The SpraySyn burner is presented which is studied within the priority program SPP1980. The burner is a piloted spray burner used for nano particle synthesis. Experimental and numerical results are presented which serve the characterisation of the flame.

 

Rev. Sci. Instrum 90, 085108 (2019)

23.08.2019 Jürgen Warnatz Award 2019

 

Our former doctoral student and postdoc, Dr. Martin Rieth, receives the Jürgen Warnatz Award 2019 from the German Section of the Combustion Institute for outstanding achievements in the field of combustion research. We are very proud of this achievement - congratulations, Martin!

11.04.2019 Publication accepted in Fuel

 

Transient auto-igniting jet flame with a domain lenght of over 40 nozzle-diameters is simulated using sophisticated combustion models.

20.11.2018 Publication accepted in Flow, Turbulence and Combustion

 

A uniform Gaussian filter has been applied explicitly to the LES conservation equations to simulate a piloted non-premixed methane-air flame (Sandia Flame D). Overall, consistent results have been achieved at a cost that is moderate with implicit or explicit filtering.

07.10.2018 New publication in Shock Waves

 

In this work, the influence of non-ideal effects on the ignition-delay time and the ignition mechanism of a stoichiometric H2/O2 mixture in a shock tube was investigated. A time-varying state was observed behind the reflected shock, which led to a forced ignition in the case under study.

 

Shock Waves (2018) 1-11

17.09.2018 New publication in Physics of Fluids

 

The physical mechanisms responsible for flame curvature evolution of a methane-air premixed flame attached to a bluff-body burner have been investigated. The contributions to the mean curvature generation due to the fluid flow motion and to a combination of flow and flame propagation induced strain rates have been analyzed in detail and dominant contributions in different zones of the flame have been identified.

Phys. Fluids 30:9 (2018) 095101

10.09.2018 Publication accepted in Combustion and Flame


In this work, a hybrid method is presented that efficiently combines the method of the transported probability density function with the assumed probability density function method. The much more detailed and accurate transported probability density function is used only where it is actually needed, so that the simulation gets by with less computation time without sacrificing accuracy. In the work, the process is tested on a piloted partially premixed flame and its performance is demonstrated.