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 →

DFG Funds Research on Isogeometric BEM at TU Darmstadt

I am proud to announce that DFG grants funding for our research on the simulation of superconducting cavities with isogeometric boundary elements “IGA-BEM”. The project is supervised by Stefan Kurz (KU 1553/4-1) and myself (SCHO1562/3-1). The aim of the joint project is the highly accurate simulation of resonant frequencies of superconducting cavities in particle accelerators. Since the simulation accuracy heavily depends on the geometry representation it will be described and discretized with Non-Uniform Rational B-Splines, which allow an exact description of the computer aided design.

Kleinheubacher Tagung 2015, Miltenberg

kh2013_logoThe German U.R.S.I. Commission is organizing the “Kleinheubacher Tagung 2015” from September 28–30 in Miltenberg. We are contributing with three talks:
  • Wednesday, 10:00 – 10:20: Finite-Element Techniques for Foil-Winding Modelling (H. De Gersem, S. Schöps)
  • Wednesday, 10:20 – 10:40: On the Use of Isogeometric Analysis in Electrical Engineering (J. Corno, A. Pels, C. de Falco, S. Schöps)
  • Wednesday, 11:00 – 11:20: Explicit time integration of eddy current problems with a weakly gauged Schur complement vector potential formulation (J. Dutiné, M. Clemens, C. Richter, S. Schöps, G. Wimmer)

International Congress on Industrial and Applied Mathematics 2015

http://www.iciam2015.cnThe International Congress on Industrial and Applied Mathematics (ICIAM) is held every four years and from August 10 to 14, 2015, mathematicians from around the world gathered in Beijing, China for the 8th ICIAM held at the China National Convention Center inside the Beijing Olympic Green. We have been presenting works on Multirate Time-Domain Simulation of Field/Circuit Coupled PWM Controlled Devices (together with Ruth Vazquez Sabariego and Johan Gyselinck) and Modelling of TESLA Cavities’ Eccentricity with Isogeometric Analysis (Jacopo Corno with Carlo de Falco). The poster presentation of the latter work has been recorded by ICIAM TV; there is also an interview of Prof. Annalisa Buffa talking about IGA.

New preprint on IGA for cavity simulation

MOX Report 31/2014 The preprint “Isogeometric Simulation of Lorentz Detuning in Superconducting Accelerator Cavities” (Corno, J.; de Falco, C.; De Gersem, H.; Schöps, S.) is online as MOX Report 31/2014. Cavities in linear accelerators suffer from eigenfrequency shifts due to mechanical deformation caused by the electromagnetic radiation pressure, a phenomenon known as Lorentz detuning. In this paper, Isogeometric Analysis is used to discretize both mechanical deformations and electromagnetic fields in a coupled multiphysics simulation approach.

Annalisa Buffa visits Darmstadt

imatiOn Monday, May 19, a talk will be given within the general TEMF/CE Seminar. At 10:00, Prof. Annalisa Buffa from the Institute of Applied Mathematics and Information Technology (IMATI) in Pavia will talk about “Innovative compatible discretization techniques for Partial Differential Equations”. The talk will be held in S4|10-1 (Lecture room, Dolivostraße).

Student Grant for Jacopo (CEFC 2014)

Jacopo Corno was awarded a student grant from CEFC 2014 for his contribution “Isogeometric Simulation of Lorentz Detuning in Superconducting Accelerator Cavities” (joint work with Politecnico Milano, Carlo de Falco). The paper discusses the frequency shift in a superconductive cavity induced by mechanical deformation due to the electromagnetic pressure. A highly accurate solution of the coupled electromagnetic-mechanic problem is obtained by isogeometric analysis and compared to an approach based on traditional finite elements.