International Conference on Computational Engineering

The 4th International Conference on Computational Engineering takes place from Thursday, September 28, to Friday, September 29, 2017 at the darmstadtium conference center next to Technische Universität Darmstadt. The conference is organized by the Graduate School of Computational Engineering at TU Darmstadt together with the International Graduate School of Science and Engineering at Technical University of Munich, the Stuttgart Research Center for Simulation Technology at University of Stuttgart and the Aachen Institute for Advanced Study in Computational Engineering Science at RWTH Aachen University. Continue reading →

STEAM Collaboration Meeting 2017

From September 21st-22nd experts from CERN, Geneva and Tampere University of Technology, Finland and Technische Universität Darmstadt, Germany meet at the Graduate School CE, Darmstadt. They discuss models and methods for the simulations of transient effects in superconducting magnets and circuits. The key feature of the STEAM framework is the co-simulation of numerical models. Continue reading →

First results on fast high-order IGABEM

We published a first preprint at arXiv on our research on Isogeometric BEM for Superconducting Cavities (DFG SCHO 1562/3-1 and KU 1553/4-1). In cooperation with the Computational Mathematics group in Basel we discuss the usage of higher order B-splines in view of regularity requirements, convergence of the solution within the domain and multipole compression techniques. Continue reading →

New Paper on Co-Simulation for Quench Protection at CERN

Our paper on “Optimized Field/Circuit Coupling for the Simulation of Quenches in Superconducting Magnets” has been accepted by the IEEE Journal on Multiscale and Multiphysics Computational Techniques. The paper proposes an optimised waveform-relaxation approach for the simulation of magnetothermal transients in superconducting magnets. The work has been carried in the framework STEAM together with CERN.

Towards a new HPC cluster “Lichtenberg II” for TU Darmstadt

Lichtenberg-Cluster an der TU Darmstadt. Bild: Katrin Binner

From the press release: “Ein wichtiges Etappenziel für den Ausbau des Lichtenberg-Hochleistungsrechners ist geschafft: Der Wissenschaftsrat hat während seiner Frühjahrssitzungen das TU-Vorhaben „Lichtenberg II“ für die Förderung im Bund-Länder-Programm Forschungsbauten empfohlen. Beantragt sind 15 Millionen Euro, über die die Gemeinsame Wissenschaftskonferenz von Bund und Ländern Ende Juni entscheiden wird.”

Update. Funding is granted: “Lichtenberg II für die Spitzenforschung TU erhält 15 Millionen Euro von Bund und Land für Hochleistungsrechner” Continue reading →

Winter excursion to GSI, Darmstadt

Today, computational engineering students and several colleagues from our work group of computational electromagnetics made an excursion to the GSI Helmholtzzentrum für Schwerionenforschung. We visited the ion sources, the linear accelerator, the control room and we had a look to the prototype of the Super-FRS Magnet of the FAIR project. Thanks to the GSI for the tour and the important research that you do!

Albert Ruehli is visiting Darmstadt

Dr. Albert Ruehli, life fellow of IEEE, adjunct professor at Missouri University and former IBM research staff member is visiting TU Darmstadt this week. He gives today an introductory talk in the undergraduate course “Elektromagnetisches CE” on the history of the modified nodal analysis and on the events that led to its development at IBM in the 70s. If you could not attend, you might want to look at this youtube video.

New paper on Waveform Relaxation for Multiscale Problems

jcp Our paper on Waveform Relaxation for the Computational Homogenization of Multiscale Magnetoquasistatic Problems (Innocent Niyonzima, Christophe Geuzaine, Sebastian Schöps) has been accepted by JCP:
This paper proposes the application of the waveform relaxation method to the homogenization of multiscale magnetoquasistatic problems. In the monolithic heterogeneous multiscale method, the nonlinear macroscale problem is solved using the Newton–Raphson scheme. The resolution of many mesoscale problems per Gauss point allows to compute the homogenized constitutive law and its derivative by finite differences. In the proposed approach, the macroscale problem and the mesoscale problems are weakly coupled and solved separately using the finite element method on time intervals for several waveform relaxation iterations. The exchange of information between both problems is still carried out using the heterogeneous multiscale method. However, the partial derivatives can now be evaluated exactly by solving only one mesoscale problem per Gauss point. Continue reading →