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 →
Dr. Lars Kielhorn from TailSiT GmbH, Graz (Austria) talks on 25 Jul 2016, 16:15–17:45 (room S4|10-314) in the seminar on Computational Engineering. Abstract: Electrical machines commonly consist of moving and stationary parts, e.g., an electric motor features a rotor and a stator. If volume based numerical schemes such as the Finite Element Method (FEM) are applied the electromagnetic simulation of such devices is a challenging task since the variation of the geometrical configuration needs to be incorporated into the numerical scheme. Continue reading
On Friday, July 1st Michal Maciejewski from CERN and Lodz University of Technology is visiting Computational Engineering at TU Darmstadt in the framework of the STEAM (“Simulation of Transient Effects in Accelerator Magnets”) cooperation, see e.g. this presentation. The aim of this project is the accurate prediction of quenches.
E. Jan W. ter Maten from the Bergische Universität Wuppertal talks on 27 Jun 2016, 16:15–17:15; Location: S2|17-103 on “Nanoelectronic coupled problem solutions: methods and applications”. Continue reading
Prof. Dr. Sergej Rjasanow from Saarland University talks on Finite Element Method on uniform and adaptive polygonal and polyhedral meshes at 30 May 2016, 16:15–17:45; Location: S2|17-103. From the abstract
In the development of numerical methods to solve boundary value problems the requirement of flexible mesh handling gains more and more importance. The BEM-based finite element method  is one of the new promising strategies which yield conforming approximations on polygonal and polyhedral meshes, respectively. Continue reading →
This week Dr. Felix Fritzen from KIT was visiting Darmstadt to work with us on an implementation of various Model Order Reduction techniques for parametrized systems, e.g., to be used in uncertainty quantification. The work is part of the scientific network Cosimor. The figure on the left shows an -surprisingly beautiful- error plot that we obtained.
Next week Prof. Dr. Hans Georg Brachtendorf of the Upper Austria University of Applied Sciences (FHO), Hagenberg is visiting the Graduate School CE and TEMF at TU Darmstadt. He will give an overview of the FHO activities in the fp-7 research projects ICESTARS, nanoCOPS, the ENIAC project ARTEMOS, and the Austrian basic research project “Spline/wavelet based methods in circuit simulation” on 12 Jan 2015, 16:15–17:45; Location: S2|17-103. Continue reading →
Dr. Wim Schoenmaker from Magwel NV (Leuven, Belgium) visits TEMF and the Graduate School CE next week. On Monday (1 Dec 2014, 16:15–17:45; Location: S2|17-103) he will talk on Electrostatic discharge (ESD). It is a serious design concern in microelectronic device fabrication and usage. Current spikes of the order of amperes active over a time lap of a nanosecond need to be screened off from the core circuits by ESD protection devices. On-chip silicon controlled rectifiers are used for this purpose. The fast transient effect lead to appreciable induced magnetic fields and a detailed understanding of the temporal response requires that the induced magnetic fields are included. In this talk we will discuss the transient electromagnetic approach to semiconductor device engineering and for completeness also discuss a numerical implementation of the self-induced Lorentz force effects. Although the latter have a small impact on the final results, the computation of these effects is very demanding. In particular, the Newton-Raphson scheme shows peculiar convergence behavior which is not fully understood so far.