Aim
The numerics group at the Institute for Combustion and Gasdynamics (IVG) is concerned with modeling and simulation of fluid dynamics, reaction kinetics and aerosol dynamics. The group focuses on the development of physical models and numerical methods and their implementation into open source program libraries. The close coupling to running experiments in lab and technical scale allows us to perform detailed validation studies of both, the simulation methods and the experimental diagnostics.
Supplementary to the experimental studies, the numerical simulation allows access into metrological inaccessible areas and scales. Object of the simulations are particle synthesis reactors, engine combustion processes and biological flows, preferably under consideration of all occurring physical effects.

Approach
The numerical simulation is interdisciplinary, located in physics, applied mathematics and computer science. The applied models are based on the conservation principle and can be formulated as transport equations of scalar and vector field quantities. The applied solution methods for these non-linear, partial differential equations are finite difference, finite volume and stochastic methods.
For the development of new methods the open source libraries OpenFOAM^TM and Cantera are applied. One big advantage of these libraries, besides of the source code availability, is their portability onto high performance computer architectures. The computational facilities at the university of Duisburg-Essen comprise several parallel-cluster solutions and the newly installed Cray XT6m supercomputer, with a Linpack performance of more than 26 TFlop/s.

References
M. Finck, D. Hänel, I. Wlokas, Simulation of nasal flow by lattice Boltzmann methods, Computers in Biology and Medicine 37 (6), 739-749 (2007)
S. Staude, C. Hecht, I. Wlokas, C. Schulz, and B. Atakan, Experimental and Numerical Investigation of Fe(CO)5 Addition to Laminar Premixed Hydrogen/Oxygen/Argon Flame, Z. Phys. Chem. 223, 639-649 (2009)

Contact
Dr.-Ing. I. Wlokas, i.wlokas@uni-due.de, Tel +49 (0)203 - 379 1571, IVG