Visiting Scientists

21.07.2011
Visit Prof. Slawig

July, 21st, Professor Thomas Slawig was guest of the Chair of Numerical Thermo- Fluid Dynamics. Within the NTFD-Seminar he was giving a talk about "Automatic differentiation (AD) in Simulation and Optimal Control". Professor Slawig is the Head of the Research Group "Algorithmic Optimal Control - Computational Marine Science" in the Cluster of Excellence "The Future Ocean" at the Department of Computer Science at Christian-Albrechts-Universität zu Kiel. In a fruitful discussion the problem of applicability of AD for VIRTUHCON was discussed. The best problem to give AD a try seems to be the subproject "Model reduction by optimal Control" which is the currently running master thesis of Ph. Mäser.

27.6-01.7.2011
Visit Dr. Angus Gray-Weale

Dr. Gray-Weale is Research Group leader at the University of Melbourne (Australia) and visits the visits the Virtuhcon centre to discuss results on on going collaborative work in the field of Molecular Dynamics simulations applied to molten oxide based liquids.

29.6.2011
Visit Dr. Sandro Jahn

Dr. Sandro Jahn is with the GFZ German Research Centre for Geosciences and is the head of the DFG-funded Emmy-Noether Junior Research Group: Melts and Fluids in Geomaterials: From First-Principles to Geological Processes. He visits the Virtuhcon centre to initiate a collaborative work on Molecular Dynamics simulation on liquid slags.

17.06.2011
Visit Dr. Eskin

Dr. Eskin, DBR Technology Center, visited the Virtuhcon centre. Within the Virtuhcon-Coloquium at the Department of Energy Process Engineering and Chemical Engineering he was giving a lecture "Modeling of particulate flows in industrial applications".

23.05.2011
Visit Prof. Robertson

David Robertson is Professor Emeritus at the Missouri University of Science and Technology. He was the TMS Extractive Metallurgy Lecturer in 2008 and Director of the national Center for Pyrometallurgy (funded by the US Bureau of Mines) from 1985-1996. He was the AIST Elliott Lecturer in 2010. He gave a lecture which summarized how steel is made and provided some examples of some basic research projects in steelmaking that have increased our understanding of the process and assisted in important innovations.

04.04.2011
Visit Prof. Turányi, Co-operation with ELTE

Prof. Turányi from the Eötvös University Budapest (ELTE) was a guest of the Chair of NTFD from March, 29th - 30th. During his stay, Prof. Turányi visited the Department of Energy Process Engineering and Chemical Engineering, the Department of Thermal Engineering and the Department for Mechanics and Fluid Dynamics. On the second day, Professor Turányi was giving a Lecture "Optimization of combustion mechanisms". In a fruitful discussion several points of interest have been discussed. An intensive collaboration between the department of chemistry of ELTE and NTFD/Virtuhcon in the fields of combustion modeling, mechanisms development/mechanisms reduction, and combustion experiments has been arranged. Further, the constitution of an ERASMUS program for the exchange of students was appointed.

03.03.2011
Visit Prof. Thévenin on March

Prof. Thévenin, co-organizer of the 1st ERCOFTAC conference on Multiphase Flows in Gasification and Combustion (www.virtuhcon-conference.de), and two of his research team members visited the Chair of Numerical Thermo-Fluid Dynamics and the Virtuhcon centre. Based on the common research interests, the ongoing experimental and numerical research activities on inverse rich diffusion flames (FG flame) were discussed. It was agreed to start collaboration on simulating the physical and chemical processes in the reforming zone of the FG flame using direct numerical simulation (DNS). Prof. Thévenin gave a seminar on "Direct Numerical Simulation of highly turbulent flames" showing recent results. He highlighted the possible use of DNS for advanced model development as well as High Performance Computing (HPC) aspects. Prof. Thévenin holds the Chair of Fluid Dynamics & Technical Flows at the Institute of Fluid Dynamics & Thermodynamics at Otto-von-Guericke Universität Magdeburg (www.uni-magdeburg. de). He is an expert in modeling of turbulent combustion using Direct Numerical Simulation (DNS).

02.03.2011
Visit Prof. Kronenburg

Prof. Kronenburg and Dr. Oliver Stein from the University of Stuttgart visited the Chair of Numerical Thermo-Fluid Dynamics and the Virtuhcon centre. After an extended laboratory tour of the facilities in Freiberg, possible future collaborations were discussed. Prof. Kronenburg gave a seminar on "Combustion LES of turbulent lifted flames". He illustrated the use of conditional moment closure (CMC) especially focusing on the different stabilization mechanisms of lifted flames. Prof. Kronenburg holds the Chair of Technical Combustion at the University of Stuttgart (www.itv.uni-stuttgart.de). He is an expert in modeling of turbulent combustion using conditional moment closure (CMC).

18.02.2011
Visit Prof. Sundman

Prof. Bosse Sundman, formerly head of the Computational Thermodynamics (CT) Division at the Materials Science and Engineering (MSE) Department at the Royal Institute of Technology (KTH) and now with the INSTN/CEA, Saclay, France gave a talk on thermodynamic modeling. In thermodynamic databases the Gibbs energy for each phase is modeled as a function of temperature and the constitution of the phase. Calculations using databases with assessed binary and ternary systems can reproduce the experimental data but also be extrapolated to calculate multi-component systems. However, the most important use of the databases is that the models can be extrapolated outside the range of stability of the phases and applied to simulations of phase transformations . That is a good fundament for future cooperation and projects with the research group of Dr. Masset.