During September I will be out of office (Wuppertal). I will be a guest at the Wave Propagation and Signal Processing Research Group of the Katholieke Universiteit Leuven, Kortrijk, thanks to my DAAD grant.
www.schoeps.org
Tag Archive for 'Simulation'
Eddy Currents
Next term the chair of numercial analysis, Bergische Universität Wuppertal, offers a lecture on Computational Magnetics. The aim is to develop an Octave software package to simulate magnetoquasistatic fields.
All the typical tasks of applied mathematics will be covered: modeling, software design, coding, testing, simulation und visualization.
Compumag 2009 Plenary
The given application is a multirate framework for the efficient simulation of field/circuit coupled problems. Within this framework, a guarantee for convergence and stability was given by PDAE analysis. It was shown that different time step sizes in different parts of the model can be automatically chosen according to the problem’s dynamics. Finally a finite element model of a transformer coupled to a circuit was given to illustrate the efficiency of the multirate method.
The talk was awarded with a COMPUMAG best paper commendation.
Continue reading ‘Compumag 2009, Florianópolis’I have written a simulation package FIDES to test multi rate time integration in coupled electromagnetic field and electric circruit equations. The package is part of the COMSON Demonstrator Platform, using OCTAVE as its interpreter.
Recently I wanted to visualize my results. I used ffmpeg to produce a movie from several plots of the flux distribution inside a transformer.
Um Nullstellen von nicht-linearen Problemen zu bestimmen, benötigt man Startwerte in der Nähe der Lösung. Wenn man diese nicht kennt, kann man versuchen das Newton-Verfahren zu globalisieren, zum Beispiel mit einem Einbettungsverfahren. Das eignet sich besonders für praxisnahe Probleme, die von einem ausgezeichneten Parameter abhängen. Dieser Steuerungsparameter kann zum Beispiel bei der Modellierung eines naturwissenschaftlichen Prozesses die Zeit repräsentieren. Details finden sich im Buch Newton Methods for Nonlinear Problems: Affine Invariance and Adaptive Algorithms von Peter Deuflhard, oder in einer Zusammenfassung, die ich als Seminararbeit angefertigt habe. 
Recent Commits
- added fit model of unit cube 25. October 2011
- analytic example for the wave equation 21. October 2011
- added initial support for heat simulation 21. October 2011
- workaround removed because 'fill' works in octave 3.4.3 21. October 2011
- added a simple Runge-Kutta-Chebyshev scheme 20. October 2011
- added van der Pol test equation 20. October 2011
- creates stability plots for explicit schemes 20. October 2011
- motor updated (but still broken) 20. October 2011
- some bugs fixed 19. October 2011
- function is more fail save 19. October 2011