Coupled Multiphysical Simulations

Understanding the interplay of circuits, electromagnetic, thermal and machanical fields

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Complex simulation models in the engineering sciences usually consist of many submodels, e.g. from different physical disciplines (“multiphysics”) or different scales in time and place (“multiscale” and “multirate”).

For example, often devices can be simulated sufficiently accurate as electrical circuits, i.e., by lumped network models. However, the increasing frequencies and the decreasing size forces designers to account for wave propagation effects, eddy-currents, ferromagnetic saturation and hysteresis as well as multiphysical phenomenae. Complicated material behavior, e.g. superconductivity make the mathematical model even more challenging. Some of those effects can be represented by order-reduced equivalent models that are embedded in an electrical circuit but other require fully coupled simulations.

The representation of field-dependent nonlinearities, hysteresis and multiphysical effects is not straightforward. Complex 3D field models are required, e.g. discretized with classical finite elements (FEM) or isogeometric analysis (IGA). Therefore hybrid field/circuit models are a relevant research topic on its own.

Lorenzo Bortot ; Bernhard Auchmann ; Idoia Cortes Garcia ; Herbert De Gersem ; Michał Maciejewski ; Matthias Mentink ; Sebastian Schöps ; Jeroen Van Nugteren ; Arjan Verweij (2020):
A Coupled A-H Formulation for Magneto-Thermal Transients in High-Temperature Superconducting Magnets.
In: IEEE Transactions on Applied Superconductivity, ISSN: 1051-8223, DOI: 10.1109/TASC.2020.2969476, ARXIV: 1909.03312. [Article]

Thorben Casper ; David José Duque ; Sebastian Schöps ; Herbert De Gersem. Automated Generation of Netlists from Electrothermal Field Models. In Nanoelectronic Coupled Problems Solutions, volume 29 of Mathematics in Industry, chapter 5, pages 93–113. Springer, 2019.

Thorben Casper ; David Duque ; Sebastian Schöps ; Herbert De Gersem (2019):
Automated Netlist Generation for 3D Electrothermal and Electromagnetic Field Problems.
In: Journal of Computational Electronics, 18, (4), pp. 1306–1332, DOI: 10.1007/s10825-019-01368-6, ARXIV: 1809.08588. [Article]

Thorben Casper ; Ulrich Römer ; Herbert De Gersem ; Sebastian Schöps (2019):
Coupled Simulation of Transient Heat Flow and Electric Currents in Thin Wires: Application to Bond Wires in Microelectronic Chip Packaging.
In: Computers and Mathematics with Applications, ISSN: 0898-1221, DOI: 10.1016/j.camwa.2019.10.009, ARXIV: 1809.09034. [Article]

Michał Maciejewski ; Pascal Bayrasy ; Klaus Wolf ; Michał Wilczek ; Bernhard Auchmann ; Tina Griesemer ; Lorenzo Bortot ; Marco Prioli ; Alejandro Manuel Fernandez Navarro ; Sebastian Schöps ; Idoia Cortes Garcia ; Arjan Peter Verweij (2018):
Coupling of Magnetothermal and Mechanical Superconducting Magnet Models by Means of Mesh-Based Interpolation.
In: IEEE Transactions on Applied Superconductivity, ISSN: 1051-8223, DOI: 10.1109/TASC.2017.2786721. [Article]

Lorenzo Bortot ; Bernhard Auchmann ; Idoia Cortes Garcia ; Alejando M. Fernando Navarro ; Michał Maciejewski ; Matthias Mentink ; Marco Prioli ; Emmanuele Ravaioli ; Sebastian Schöps ; Arjan Verweij (2018):
STEAM: A Hierarchical Co-Simulation Framework for Superconducting Accelerator Magnet Circuits.
In: IEEE Transactions on Applied Superconductivity, ISSN: 1051-8223, DOI: 10.1109/TASC.2017.2787665. [Article]

Lorenzo Bortot ; Bernhard Auchmann ; Michał Maciejewski ; Marco Prioli ; Sebastian Schöps ; Idoia Cortes Garcia ; Arjan Peter Verweij (2018):
A 2-D Finite-element Model for Electrothermal Transients in Accelerator Magnets.
In: IEEE Transactions on Magnetics, 54, (3), pp. 1–4, ISSN: 0018-9464, DOI: 10.1109/TMAG.2017.2748390, ARXIV: 1710.01187. [Article]

Michał Maciejewski ; Idoia Cortes Garcia ; Sebastian Schöps ; Bernhard Auchmann ; Lorenzo Bortot ; Marco Prioli ; Arjan Peter Verweij (2017):
Application of the Waveform Relaxation Technique to the Co-Simulation of Power Converter Controller and Electrical Circuit Models.
In: 2017 22nd International Conference on Methods and Models in Automation and Robotics (MMAR), 837–842. IEEE. DOI: 10.1109/MMAR.2017.8046937, ARXIV: 1704.02839. [In Proceedings]

Jacopo Corno ; Carlo de Falco ; Herbert De Gersem ; Sebastian Schöps (2016):
Isogeometric Simulation of Lorentz Detuning in Superconducting Accelerator Cavities.
In: Computer Physics Communications, 201, pp. 1–7, ISSN: 0010-4655, DOI: 10.1016/j.cpc.2015.11.015, ARXIV: 1606.08209. [Article]

Thorben Casper ; Ulrich Römer ; Sebastian Schöps (2016):
Determination of Bond Wire Failure Probabilities in Microelectronic Packages.
In: 22nd International Workshop on Thermal Investigations of ICs and Systems (THERMINIC 2016), 39–44. IEEE. ISBN: 978-1-5090-5450-3, DOI: 10.1109/THERMINIC.2016.7748645, ARXIV: 1609.06187. [In Proceedings]

Thorben Casper ; Herbert De Gersem ; Sebastian Schöps. Willem van Driel ; Peter Rodgers (editors) (2016):
Automatic Generation of Equivalent Electrothermal SPICE Netlists from 3D Electrothermal Field Models.
In: 17th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE 2016). IEEE. ISBN: 9781509021079, DOI: 10.1109/EuroSimE.2016.7463329, ARXIV: 1610.04304. [In Proceedings]

Lorenzo Bortot ; Michał Maciejewski ; Alejandro Manuel Prioli, Marco Fernandez Navarro ; Jonas Blomberg Ghini ; Bernharda Auchmann ; Arjan Peter Verweij (2016):
A Consistent Simulation of Electro-thermal Transients in Accelerator Circuits.
In: IEEE Transactions on Applied Superconductivity, ISSN: 1051-8223, DOI: 10.1109/TASC.2016.2639585. [Article]

Lorenzo Bortot ; Michał Maciejewski ; Marco Prioli ; Alejandro Manuel Fernandez Navarro ; Sebastian Schöps ; Idoia Cortes Garcia ; Bernhard Auchmann ; Arjan Peter Verweij (2016):
Simulation of Electro-Thermal Transients in Superconducting Accelerator Magnets with COMSOL Multiphysics.
In: Proceedings of the European COMSOL Conference 2016. URL: [In Proceedings]

Sebastian Schöps (2015):
Iterative Schemes for Coupled Multiphysical Problems in Electrical Engineering.
In: IFAC-PapersOnLine, volume 48, 165–167. Elsevier. DOI: 10.1016/j.ifacol.2015.05.174. [In Proceedings]

Andreas Bartel ; Markus Brunk ; Michael Günther ; Sebastian Schöps (2013):
Dynamic Iteration for Coupled Problems of Electric Circuits and Distributed Devices.
In: SIAM Journal on Scientific Computing, 35, (2), pp. B315–B335, ISSN: 1064-8275, DOI: 10.1137/120867111. [Article]