Today was the last day of the 16th European Conference on Mathematics for Industry that took place in the Historische Stadthalle in Wuppertal. As a member of the working group of applied math and numerical anaylsis, I was part of the local organizing committee.
I gave a talk in the minisymposium on Electromagnetic Field Computation about fitting reduced order models in magnetoquasistatic field problems (similarly to the talk in Essen) but also on the converegence of the scheme (slides 13ff).
Continue reading ‘ECMI 2010 is over’ Tag Archive for 'Conference'
Today was the last day of the 16th European Conference on Mathematics for Industry that took place in the Historische Stadthalle in Wuppertal. As a member of the working group of applied math and numerical anaylsis, I was part of the local organizing committee.
I gave a talk in the minisymposium on Electromagnetic Field Computation about fitting reduced order models in magnetoquasistatic field problems (similarly to the talk in Essen) but also on the converegence of the scheme (slides 13ff).
Continue reading ‘ECMI 2010 is over’ 
The Symposium on Electromagnetic Phenomena in Nonlinear Circuits (EPNC) 2010 was this year in Essen. – A stone’s throw from Wuppertal. I gave another talk on co-simulation. Here the method was applied to an induction motor, as shown in the figure on the right. The coupling is given by extracted inductances, similarily to the method presented at the Compumag 2009. This time the focus was on signal processing; the waveforms are smoothed to allow for large time steps.
I attended to the Compumag 2009 in Florianópolis supported by a travel grant from the DAAD (German Academic Exchange Service). At the conference I showed a nice application of my latest research on co-simulation (together with Andreas Bartel and Herbert De Gersem). The theory is based on the work of Arnold/Günther: “Preconditioned dynamic iteration for coupled differential-algebraic systems” – BIT Numerical Mathematics.
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’m back from the SCEE 2008 (Scientific Computing in Electrical Engineering) Conference in Espoo, Finland.The picture on the left is given to illustrate my coupling approach during my talk about circuits refined by 3-D conductor models. The circuit is given in terms of the modified nodal analysis and the field is discretized by the finite integration technique. The coupled system is introduced and analyzed; numerical results are obtained by co-simulation (“weak coupling”) and monolithic coupling (“strong”). The basic ideas are taken from my thesis, but there are new additional theoretical and numerical results.
Continue reading ‘SCEE in Finland’
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