IGTE Symposium 2026

The 22^nd International IGTE Symposium on Computational Methods in Electromagnetics and Multiphysics will be held from September 20 to 23, 2026 at Hotel Novapark Graz, Austria. Online attendance will also be possible.

The aim of the IGTE Symposium is to present and discuss recent developments in computational electromagnetics (low frequency as well as high frequency) and its practical application. As part of IGTE'26, special sessions on the topics of Magnetic Losses in Laminated Cores and Machine Learning-Based Methods for Modeling, Optimization and Inverse Problems in Electromagnetics are planned. In addition, a follow-up PhD workshop on the topic of Surrogate-assisted Optimization Using Machine Learning Approaches will take place directly after IGTE’26.

Digest submission deadline: June 30, 2026
Further information: igtesymp.tugraz.at

The IGTE team contributed to the 22nd Biennial IEEE Conference on Electromagnetic Field Computation (IEEE CEFC 2026) with the following poster presentations:

• Numerical Investigation of the Coupling Behavior of Electrically Small Magneto-Electric Antennas in TEM Cells
  Simon Prato, Domink Kreindl, Thomas Bauernfeind
• A Cloud-Native Microservice Platform for Teaching Antenna and Electromagnetic Field Theory
  Paul Baumgartner, Thomas Bauernfeind, Dominik Mayrhofer

The IGTE team contributed to the 32nd AIAA / CEAS Aeroacoustics Conference 26-29 May 2026, Brussels, Belgium (Aeroacoustics 2026) with the following talk on Natural Helmholtz Decomposition Vision Transformer:

• Physics-informed deep learning for separating vortical motions and acoustic waves in fluid flows

The IGTE team contributed to POSTER 2026 with the following papers:

• Equivalent Circuit Models of Near-Field Coupling between Electrically Small Antennas and TEM Cells
  Simon Prato¹
  Rohde Schwarz Award
• Compressible flow simulation of acoustic energy dissipation at a liner orifice under harmonic excitation
  Thomas Brunner¹
  1st Prize, Best Poster Award
• Vibration Control in Composite Materials by Graded Acoustic Black Holes
  Jan Boysen¹, Ashish Kumar Singh², Simon Boysen³
  2nd Prize, Best Poster Award
• PsyTools: An Open-Source Python Toolbox for Standardized Psychoacoustic Analysis
  Eugen-Maximilian Stangl¹, Julia Donnerer¹

¹ Institute of Fundamentals and Theory in Electrical Engineering (IGTE), Graz University of Technology, 8010 Graz, Austria
² National Institute of Technology, Silchar, Assam 788010, India
³ Faserinstitut Bremen e.V., 28359 Bremen, Germany

Vorstellung aktueller Projekte und Lehrveranstaltungen am IGTE

Das Institut für Grundlagen und Theorie der Elektrotechnik (IGTE) lädt alle interessierten Studierenden am 20.05.2026 ab 16:00h im HS i3 zum openIGTE ein.

The IGTE team contributed to the 16th International Conference on Scientific Computing in Electrical Engineering (SCEE 2026) with the following keynote talk:

• Determining the local magnetic material parameters of electric steel sheets using inverse schemes

The Graz Center of Computational Engineering (GCCE), with IGTE as one of its members, organized a successful Poster Day on 8 April 2026 at the Aula of TU Graz. The event brought together researchers, PhD students, and PostDocs working in various interdisciplinary fields of computational engineering, providing an excellent platform for scientific exchange and networking.

Read more here.

The IGTE team contributed to DAGA 2026 in Dresden, Germany with the following papers:

• Overview and simulation of modulated ultrasound MEMS loudspeakers
  Dominik Mayrhofer¹, Tobias Wilczacki¹, Manfred Kaltenbacher¹
• Investigation of the acoustic mechanism in micro-perforated absorber
  Manfred Kaltenbacher¹, Felicitas Spörk¹, Dominik Mayrhofer¹
• Vibration and noise control of functionally graded panels, incorporating the acoustic black hole effect
  Jan Boysen¹, Ashish Kumar Singh², Atanu Sahu², Simon Boysen³, Stefan Schoder¹
• 2D scale-resolved compressible flow simulation of a liner orifice
  Stefan Schoder¹, Thomas Brunner¹
• Predicting the Effect of Noise Barriers with the Discontinuous Galerkin Method
  Florian Kraxberger¹, Johannes Heinz⁴, Stefan Schoder¹, Manfred Kaltenbacher¹, Christian Adams¹
• Similitude for Decoupled Acoustic Cavities with Geometric Distortion
  Giada Cardellino¹, Francesco Franco⁵, Giuseppe Petrone⁵, Sergio De Rosa⁵, Christian Adams¹
• Einfluss von gestörten Zuströmbedingungen auf die Schallabstrahlung von eingehausten Radialventilatoren
  Felix Czwielong⁶, Patrick Heidegger¹, Christoph Heigl⁶, Stefan Schoder¹, Manfred Kaltenbacher¹, Stefan Becker⁶
• Knacks oder Popp? - Psychoakustik knacksender Gelenke im Spannungsfeld von Empfindung und Persönlichkeit
  Gabriel Feller⁷, Sarah Ambros⁷, Christoph Reuter⁷, Isabella Czedik-Eysenberg⁷, Christian Adams¹, Jacqueline Wolf¹, Michiel Postema⁸

¹ Institute of Fundamentals and Theory in Electrical Engineering (IGTE), Graz University of Technology, 8010 Graz, Austria
² National Institute of Technology Silchar, Silchar, India
³ Faserinstitut Bremen e.V., Bremen, Germany
⁴ Independent researcher, Munich, Germany
⁵ Department of Industrial Engineering, University of Naples Federico II, Naples, Italy
⁶ Lehrstuhl für Strömungsmechanik, FAU Erlangen, Germany
⁷ Institut für Musikwissenschaft,  Universität Wien, Wien, Austria
⁸ Tampere University, Finland

The IGTE team contributed to the Austrian Mechanics Day, 21.11.2025, with the following talk:

• A magneto-mechanical constitutive model and its application in device simulations
  Klaus Roppert

The IGTE team contributed to NVHH 2025 with the following paper:

• Design of acoustic absorbers based on local resonant acoustic metamaterials
  Manfred Kaltenbacher, Felicitas Spörk, Dominik Mayrhofer

The IGTE team contributed to the Kleinheubacher Tagung 2025 with a keynote talk by Manfred Kaltenbacher on Hysteresis modelling and efficient finite element formulation for computational electromagnetics.

The IGTE team contributed to EMC Europe 2025 with the following paper:

• Challenges in the EMC Characterization of a CIS Camera Module for Medical and Consumer Applications
  Patrick Wiesenhofer¹, Dominik Kreindl^1,2, Bernhard Weiss¹, Thomas Bauernfeind², Christian Stockreiter¹

¹ams OSRAM AG, Austria
²Institute of Fundamentals and Theory in Electrical Engineering, Graz University of Technology, Austria

The IGTE team contributed to Compumag 2025 with the following eight papers:

• An Efficient Hysteresis Loss Evaluation Considering Magneto-Elastic Effects using the Stepwise Monotonic Hysteresis Model
  Lukas Daniel Domenig¹, Klaus Roppert^1,2, Laurent Daniel^3,4, Manfred Kaltenbacher¹, Herbert De Gersem²
• A Macroscopic Magneto-Elastic Vector Hysteresis Model for Electromagnetic Device Simulations
  Klaus Roppert^1,2, Lukas Domenig¹, Manfred Kaltenbacher¹, Herbert De Gersem², Laurent Daniel^3,4
• A New Anhysteresis Curve for Magnetic Materials
  Alexander Sauseng¹, Manfred Kaltenbacher¹, Klaus Roppert¹
• Data Driven Parameter Identification of Hysteresis Models for Cut Steel Sheets
  Eniz Mušeljić¹, Alice Reinbacher-Köstinger¹, Andreas Gschwentner¹, Manfred Kaltenbacher¹
• Identification of the Magnetic Permeability of Ferrite Materials based on Time Domain Measurements
  Barnabas Kullmann⁵, Christian Riener⁶, Thomas Bauernfeind¹, Sandor Bilicz⁵
• Design Space Reduction in Electric Machine Optimization via Global Sensitivity Analysis
  Alice Reinbacher-Köstinger¹, Gian Marco Melito⁷, Larissa Schönegger¹, Michael Wiesheu¹⁰, Theodor Komann⁹, Sebastian Schöps¹⁰
• Determination of Local Magnetic Anhysteretic Behavior in Cut Electrical Steel Sheets using Local Measurements and an Inverse Scheme
  Andreas Gschwentner¹, Manfred Kaltenbacher¹, Klaus Roppert¹
• Inverse scheme for the local determination of magnetic material properties of electric steel sheets near cutting edges
  Manfred Kaltenbacher¹, Andreas Gschwentner¹, Stefan Ulbrich⁹, Barbara Kaltenbacher⁸

¹Institute of Fundamentals and Theory in Electrical Engineering, TU Graz
²Institute for Accelerator Science and Electromagnetic Fields (TEMF), TU Darmstadt
³Université Paris-Saclay, CentraleSupélec, CNRS, Laboratoire de Génie Électrique et Électronique de Paris
⁴Sorbonne Université, CNRS, Laboratoire de Génie Électrique et Électronique de Paris
⁵Department of Broadband Infocommunications and Electromagnetic Theory, Budapest University of Technology and Economics
⁶Silicon Austria Labs
⁷Institute of Mechanics, TU Graz
⁸AAU Klagenfurt
⁹Department of Mathematics, TU Darmstadt
¹⁰Computational Electromagnetics Group, TU Darmstadt

The IGTE team contributed to POSTER2025 with the following contributions:

• Effects of hybrid turbulence modelling on aeroacoustic noise generation in automotive door gaps
  Thomas Brunner
  2nd Prize, Best Poster Award
• Characterisation of a Low-Cost Acoustic Chamber
  Patricia Zofia Jesionkowska, Florian Kraxberger
  2nd Prize, Best Poster Award
• Simulative Evaluation of the Whistling Potentiality of Pinhole Apertures
  Jan Boysen, Andreas Wurzinger
  1st Prize, Best Poster Award
• Exploring the Loss Landscape of Physics Informed Neural Networks in Room Acoustics
  Aneta Furmanová
  3rd Prize, Best Poster Award
• Developing a digital twin of a human knee prosthesis for acoustic analysis
  Andreas Wurzinger
• Simulative Evaluation of the Whistling Potentiality of Pinhole Apertures
  Jan Boysen
  3rd Prize, Elevator Pitch

The IGTE team contributed to CEM 2025 with the following four papers and a keynote talk given by Prof. Kaltenbacher:

• Open Source Software for Coupled Field Simulation
  M. Kaltenbacher¹, D. Mayrhofer¹, E. Museljic¹, K. Roppert¹, F. Toth², F. Wein^{3
  1} TU Graz, Institute of Fundamentals and Theory in Electrical Engineering
  ² TU Wien, Institute of Mechanics and Mechatronics
  ³ FAU Erlangen, Department of Mathematics
• Implementation of an Edge-Based H-Formulation in the Nonlinear Magnetostatic Case
  L. D. Domenig, K. Roppert, M. Kaltenbacher
  Institute of Fundamentals and Theory in Electrical Engineering, Graz University of Technology, Graz, Austria
• Extracting Lumped-Element Parameters from a Finite Element Three-Phase Transformer Model – A Practical Approach
  A. Sauseng, M. Kaltenbacher, K. Roppert
  Institute of Fundamentals and Theory in Electrical Engineering, Graz University of Technology, Graz, Austria
• Electrically Small Magneto-Electric Antennas For Shielding Efficiency Quantification In IC-Stripline Emission Tests
  T. Bauernfeind, D. Kreindl
  Institute of Fundamentals and Theory in Electrical Engineering, Graz University of Technology, Graz, Austria
• Efficient Quasi-Newton Finite Element Formulations for Computational Electromagnetics
  M. Kaltenbacher
  Institute of Fundamentals and Theory in Electrical Engineering, Graz University of Technology, Graz, Austria

Vorstellung aktueller Projekte und Lehrveranstaltungen am IGTE

Das Institut für Grundlagen und Theorie der Elektrotechnik (IGTE) lädt alle interessierten Studierenden am 2.4.2025 ab 16:00h im HS i1 zum openIGTE ein.

Lernen Sie das Institut und seine Mitarbeiter*innen kennen und schauen Sie sich Live-Demos von Laborexperimenten an! Studierende, die auf der Suche nach ihrer Master- oder Bachelorarbeit sind, können sich über mögliche Themen informieren. Für Getränke und Snacks ist gesorgt.

The IGTE team contributes to the DAS | DAGA 2025 with the following papers:

• Poster Award: Developing a digital twin for acoustic analysis of vibroacoustic
  sound emissions due to flow-induced sound generation
  Andreas Wurzinger¹, Stefan Schoder¹
• Vibroacoustic Investigation of the Thin-Walled Duct System
  and Fan Housing in an Aeroacoustic Test Rig
  Patrick Heidegger¹, Felix Czwielong², Stefan Schoder¹, Stefan
  Becker², Manfred Kaltenbacher¹
• Design of acoustic sound absorbers
  Dominik Mayrhofer¹, Felicitas Spork¹, Manfred Kaltenbacher¹
• A Comparison between Numerical and Experimental Investigations of a Enclosed Centrifugal Fan
  Felix Czwielong², Patrick Heidegger¹, Christoph Heigl², Manuel Lauber², Florian Wachter², Eman Bagheri², Andreas Wurzinger¹, Marco Fritzsche³, Lukas Tluczykont², Christina Madl¹, Stefan Schoder¹, Manfred Kaltenbacher¹, Stefan Becker²
• Self-similarity of free vibration decays in cantilever beams
  Christian Adams¹, Sebastian Oberst⁴
• Flow-induced sound simulation of a Mach 0.3/0.6 mixing layer
  Stefan Schoder¹
• Simulative Evaluation of the Whistling Potentiality of Pinhole Apertures
  Jan Boysen¹, Andreas Wurzinger¹, Sven Olaf Neumann⁷, Stefan Schoder¹
• Experimental Benchmarking of an Enclosed Centrifugal Fan for Fluid-Structure-Acoustic Interactions Investigations
  Felix Czwielong², Patrick Heidegger¹, Christoph Heigl², Manuel Lauber², Andreas Wurzinger¹, Marco Fritzsche³, Stefan Schoder¹, Manfred Kaltenbacher¹, Stefan Becker²
• Investigation of the influence of solution-dependent effects on ultrasound pulse-based sound generation principles
  Dominik Mayrhofer¹, Tobias Wilczacki¹, Manfred Kaltenbacher¹
• Experimental setup to map involved cognitive neuroscientific processing steps during sound recognition process
  Julia Donnerer¹, Florian Kraxberger¹, Manfred Kaltenbacher¹, Christian Adams¹
• Influence of damping layers in locally resonant acoustic metamaterials on sound barrier performance
  Dominik Mayrhofer¹, Felicitas Spork¹, Manfred Kaltenbacher¹
• Outdoor sound propagation simulations using the Discontinuous Galerkin method: Preliminary results
  Florian Kraxberger¹, Stefan Schoder¹, Christian Adams¹, Manfred Kaltenbacher¹
• Uncertainty Assessment in Analyzing the Similitude of a Vibrating Plate
  Giada Cardellino⁸, Christian Adams¹, Robert Feldmann⁸, Sergio De Rosa⁵, Francesco Franco⁵, Giuseppe Petrone⁵, Tobias Melz^6,8

¹ TU Graz, Institut fur Grundlagen und Theorie der Elektrotechnik
² Lehrstuhl fur Stromungsmechanik - FAU Erlangen
³ Polytec GmbH
⁴ University of Technology Sydney, Centre for Audio,
Acoustics and Vibration
⁵ University of
Naples Federico II, Department of Industrial Engineering
⁶ Fraunhofer LBF
⁷ Fachhochschule Kiel, Fachb. Maschinenwesen
⁸ TU Darmstadt, Fachgebiet SAM

Vorstellung aktueller Projekte und Lehrveranstaltungen am IGTE

Das Institut für Grundlagen und Theorie der Elektrotechnik (IGTE) lädt alle interessierten Studierenden am 21.11.2024 ab 16:00h im HS i6 zum openIGTE ein.

Lernen Sie das Institut und seine Mitarbeiter*innen kennen und schauen Sie sich Live-Demos von Laborexperimenten an! Studierende, die auf der Suche nach ihrer Master- oder Bachelorarbeit sind, können sich über mögliche Themen informieren. Für Getränke und Snacks ist gesorgt.

The IGTE team contributes to the Fall Workshop of the Technical Committee Physical Acoustics of the German Acoustical Society with the following presentations:

• Dämpfung freier Schwingungen im Hilbert-Huang-Spektrum
  Christian Adams^1,2, Sebastian Oberst²
• Advanced Damping Control Techniques for Plate Structures
  Giada Cardellino^3,4, Christian Adams¹, Francesco Franco⁴, Giuseppe Petrone⁴, Sergio De Rosa⁴
• Developing a digital twin of a human knee prosthesis for acoustic analysis
  Andreas Wurzinger¹, Bernhard Mayr-Mittermüller⁵, Harald Sima⁵, Stefan Schoder¹

¹ TU Graz
² University of Technology Sydney
³ TU Darmstadt
⁴ Universität Federico II Neapel
⁵ Otto Bock Healthcare Products GmbH

The IGTE team contributes to the EMC COMPO 2024 with the following paper:

• A Simulation Workflow for Predicting IC Stripline Radiated Emissions of Bond Wire-Based Systems
  Kreindl Dominik^1,2, Weiss Bernhard¹, Stockreiter Christian¹, Bauernfeind Thomas², Kaltenbacher Manfred²

¹: ams OSRAM Group, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria
²: Institute of Fundamentals and Theory in Electrical Engineering, Inffeldgasse 18, 8010 Graz, Austria

The IGTE team contributes to IGTE Symposium 2024 with the following papers:

• Global convergence of iterative solvers for magnetic field problems using local quasi-Newton updates
  Engertsberger Felix^2,3, Egger Herbert², Domenig Lukas¹, Roppert Klaus¹, Kaltenbacher Manfred¹
• Comparison of Different Workflow Strategies for EMC Simulations in Commercial CEM Suites
  Kreindl Dominik^1,4, Bauernfeind Thomas¹, Weiss Bernhard⁴, Stockreiter Christian⁴, Kaltenbacher Manfred¹
• 3D Component and PCB Modeling for High Frequency EMC Problems
  Riener Christian^1,5, Bauernfeind Thomas¹
• Determination of local magnetic properties: Inverse Scheme based on adjoined method
  Kaltenbacher Manfred¹, Gschwentner Andreas¹, Reinbacher-Köstinger Alice¹, Domenig Lukas¹, Roppert Klaus¹, Ulbrich Stefan⁶, Kaltenbacher Barbara⁷
• Data driven parameter identification of magnetic properties in steel sheets
  Mušeljić Eniz¹, Reinbacher-Köstinger Alice¹, Gschwentner Andreas¹, Kaltenbacher Manfred¹
• Determination of Local Magnetic Properties: Optimal Design of Experiments
  Reinbacher-Köstinger Alice¹, Gschwentner Andreas¹, Mušeljić Eniz¹, Ulbrich Stefan⁶, Kaltenbacher Manfred¹
• Investigation of H-Bridge PCB in time domain using reduced order Darwin model
  Kvasnicka Samuel^1,5, Roppert Klaus^1,5, Riener Christian^1,5, Bauernfeind Thomas^1,5, Kaltenbacher Manfred^1,5
• Sequential Bayesian Experimental Design for Efficiency Maps using Gaussian Processes
  Reinbacher-Köstinger Alice¹, Dhakal Pawan Kumar⁸, Heidarikani Kourosh⁸, Mušeljić Eniz¹, Komann Theodor⁶, Muetze Annette⁸, Ulbrich Stefan⁶, Kaltenbacher Manfred¹
• arterioscope.sim: Simulation platform for blood flow and its interaction with electric fields
  Krispel Thomas¹, Badeli Vahid¹, Jafarinia Alireza¹, Reinbacher-Köstinger Alice¹, Tronstad Christian¹⁰, Ranftl Sascha¹³, Martinsen Orjan Grottem¹⁰,¹¹, Kalvoy Havard¹⁰, Hisdal Jonny¹², Kaltenbacher Manfred¹, Hochrainer Thomas⁹
• Determination of local Magnetic Material Properties: MFL-based Measurement System
  Gschwentner Andreas¹, Roppert Klaus¹, Kaltenbacher Manfred¹
• Including the Simplified Multiscale Model in the Energy-Based Hysteresis Framework
  Roppert Klaus¹, Daniel Laurent¹⁴,¹⁵
• Macroscopic Inline Determination of Nonlinear Material Parameters for Rod Material
  Sauseng Alexander¹, Raninger Peter¹⁶, Kaltenbacher Manfred¹, Roppert Klaus¹
• A Method to Evaluate the Hysteresis Loss in Permanent Magnet Synchronous Machines
  Domenig Lukas¹, Roppert Klaus¹, De Gersem Herbert¹⁷, Klatenbacher Manfred¹

1: Institute for Fundamentals and Theory in Electrical Engineering, Inffeldgasse 18/1, A-8010 Graz
²: Institute of Numerical Mathematics, Altenberger Straße 69, A-4040 Linz
³: Johann Radon Institute for Computational and Applied Mathematics, Altenberger Straße 69, A-4040 Linz
⁴: ams OSRAM Group, Tobelbaderstrasse 30, A-8141 Unterpremstaetten, Austria
⁵: Silicon Austria Labs, TU-Graz SAL GEMC Lab, Austria
⁶: Department of Mathematics, TU Darmstadt, Dolivostraße 15, 64293 Darmstadt, Germany
⁷: Department of Mathematics, AAU Klagenfurt, Universitätsstrasse 65-67, 9020 Klagenfurt, Austria
⁸: Institute of Electric Drives and Power Electronic Systems, TU Graz, Inffeldgasse 18/1, 8010 Graz, Austria
⁹: Institute of Strength of Materials, Graz University of Technology, Graz, Austria
¹⁰: Department of Clinical and Biomedical Engineering, Oslo University Hospital, Oslo, Norway
¹¹: Department of Physics, University of Oslo, Oslo, Norway
¹²: Section of Vascular Investigations, Oslo University Hospital, Oslo, Norway
¹³: Institute of Theoretical and Computational Physics, Graz University of Technology, Graz, Austria
¹⁴: Université Paris-Saclay, CentraleSupélec, CNRS, Laboratoire de Génie Électrique et Électronique de Paris, 91192,
Gif-sur-Yvette, France
¹⁵: Sorbonne Université, CNRS, Laboratoire de Génie Électrique et Électronique de Paris, 75252, Paris, France
¹⁶: Materials Center Leoben, Roseggerstraße 12, A-8700 Leoben
¹⁷: Institute for Accelerator Science and Electromagnetic Fields (TEMF), TU Darmstadt, Darmstadt, Germany

The IGTE team contributes to the EMI International Conference with the following contribution:

• Automatic differentiation and neural networks for parameter identification of hysteresis models
  Manfred Kaltenbacher, Eniz Museljic, Klaus Roppert

The IGTE team contributes to Inter-Noise 2024 with the following papers:

• Prediction of vibro-acoustic sound emissions based on mapped structural dynamics
  Andreas Wurzinger¹, Patrick Heidegger¹, Florian Kraxberger¹, Bernhard Mayr-Mittermüller², Harald Sima², Manfred Kaltenbacher¹, Stefan Schoder¹
• Comparing outdoor sound propagation simulations based on geometrical and numerical methods
  Florian Kraxberger¹, Christian Adams¹, Julia Donnerer¹, Manfred Kaltenbacher¹, Stefan Schoder¹
• Sound Source Localization at the Rolling Tire
  Jonathan Nowak³, Manfred Kaltenbacher¹

¹: Institute of Fundamentals and Theory in Electrical Engineering (IGTE), TU Graz, Austria
²: Otto Bock Healthcare Products GmbH, Vienna, Austria
³: AIT Austrian Institute of Technology, Vienna, Austria

IGTE research seminar at Retzhof, July 2024, where 17 lectures with intensive discussions were held.

The IGTE is contributing to the SIELA 2024 with the following:

• Transformer Modeling – Finite Elements vs. Lumped Elements
  A. Sauseng, L. Domenig, M. Kaltenbacher, K. Roppert

The IGTE is contributing to the EPNC 2024 with the following:

• Network-Based Transformer Models – A Transient Analysis
  A. Sauseng, A. Reinbacher-Köstinger, P. Hamberger, M. Kaltenbacher, K. Roppert

The IGTE team contributes to the ISNVH 2024 with the following papers:

A Finite-Element-Simulation Workflow and First Results of the Aero- and Vibro-Acoustic Signature of an Enclosed Centrifugal Fan
Patrick Heidegger¹, Felix Czwielong², Stefan Schoder¹, Stefan Becker², Manfred Kaltenbacher¹

Transient Analysis of a Dissipative Expansion Chamber Muffler
Paul Maurerlehner¹ , Dominik Mayrhofer¹, Mehdi Mehrgou³ , Manfred Kaltenbacher¹, and Stefan Schoder¹

¹Institute of Fundamentals and Theory in Electrical Engineering, TU Graz
²Institute of Fluid Mechanics, Friedrich-Alexander-Universität Erlangen-Nürnberg
³AVL List GmbH, Graz

The IGTE is contributing to the CEFC 2024 with the following contributions:

• Surrogate Model-Based Synthesis of NFC-Transponders
  Christoph Koger¹, Eniz Museljic¹, Thomas Bauernfeind^1,2, and Alice Reinbacher-Köstinger¹
• Surrogate-Based Optimization of SMT Inductors
  Christian Riener^1,2, Alice Reinbacher-Köstinger¹, Thomas Bauernfeind^1,2, Samuel Kvasnicka^1,2, Klaus Roppert^1,2, and Manfred Kaltenbacher^1,2
• State Space Modelling of Microstrip Lines
  Lukas Quehenberger^1,2, Christian Riener^1,2, and Thomas Bauernfeind^1,2

¹Institute of Fundamentals and Theory in Electrical Engineering, Graz University of Technology, Austria
²TU-Graz SAL GEMC Lab, Silicon Austria Labs, Austria

We organize the PhD course HYSTERESIS IN FUNCTIONAL MATERIALS: FROM PHYSICAL MODELS TO NUMERICAL SIMULATION at the famous International Centre of Computational Mechanics (CISM), Udine Italy. The hysteretic behavior of certain materials provides the basis for the design of many of today’s “smart” systems. Prominent examples are ferroelectric and ferromagnetic materials, which have been adopted as sensors and actuators in diverse fields of applications, ranging from microelectromechanical systems (MEMS) for high-precision positioning to vibrational and structural noise control as well as hearing aids. For details, click here.

The IGTE is contributing to the AIAA/CEAS Aeroacoustic Conference in Rome with the following contributions:

• Development of a Didactic Demonstrator for Aeroacoustic Evaluations of Ducts
  Stefan Schoder; Dominik Mayrhofer; Florian Kraxberger; Patrick Heidegger; Andreas Wurzinger; Felix Czwielong; Paul Maurerlehner
• Similitude for Vibroacoustic Coupling Models With Geometric Distortion
  Giada Cardellino; Christian Adams; Stefan Schoder; Francesco Franco; Giuseppe Petrone; Sergio De Rosa
• Experimental Investigations of the Aeroacoustic Interactions of Fan Blade Skew, Leading Edge Serrations and Inflow Turbulence
  Felix Czwielong; Christof Ocker; Lorenzo Tieghi; Giovanni Delibra; Valerio Barnabei; Stefan Schoder; Alessandro Corsini; Stefan Becker

Das IGTE war beim ACES Symposium 2024 in Orlando, Florida mit folgenden Beiträgen in der Session „Numerical Methods in EMC“, chaired by Thomas Bauernfeind and Lloyd Riggs vertreten:

• Broadband Modeling of Mutual Coupling between Surface-Mounted Devices
  Christian Riener, Thomas Bauernfeind, Manfred Kaltenbacher
• Near Field Electromagnetic Interference Coupling-Mechanisms of Multilayer Ceramic Capacitors
  Dominik Kreindl, Thomas Bauernfeind, Bernhard Weiss, Christian Stockreiter, Manfred Kaltenbacher
• Model Order Reduction Approach for PCB Structures based on Semi-discretized Darwin Model using FEM
  Samuel Kvasnicka, Klaus Roppert, Christian Riener, Thomas Bauernfeind, Manfred Kaltenbacher
• Using the Darwin Approximation for Equivalent Circuit Parameter Extraction with Frequency-dependent Linear Materials
  Klaus Roppert, Samuel Kvasnicka, Mehdi Hatab, Thomas Bauernfeind

The IGTE is contributing to the DAGA 2024 with the following contributions:

• Strömungsakustik: Theorie und Benchmarking (Stefan Schoder¹)
• Exploring Sensitivity: The Effect of Varying Data Points on the Agreement Between Numerical and Theoretical Results (Giada Cardellinoa², Robert Feldmann², Christian Adams¹, Giuseppe Petrone³, Francesco Franco³ und Sergio De Rosa³
• Improving the model-based predicted admittance of vehicles using Bayesian parameter calibration (Wei Xu², Michael Trost⁴, Robert Feldmann², Christian Adams¹ und Tobias Melz²^,⁵)
• Frequency-Dependent Sound Power Estimation: A Comparative Study on a Baffled Plate (Yaxiong Ren², Robert Feldmann², Christian Adams¹ und Tobias Melz²^,⁵)
• Sound Source Identification at the Rolling Tire Using an Inverse Scheme (Jonathan Nowak⁶ und Manfred Kaltenbacher¹)
• A Community Call to contribute to the Benchmarking - Examples and Datasets in Computational Acoustics hosted by the EAA-TC Computational Acoustics (Stefan Schoder¹, Marcus Mäder⁷, Steffen Marburg⁷ und Manfred Kaltenbacher¹)
• Simulation of MEMS speakers using the linearized flow equations with Maxwell slip boundary conditions (Dominik Mayrhofer¹, Tobias Wilczacki¹ und Manfred Kaltenbacher¹)
• Assessment of Vibro-Acoustic Sound Emissions based on Structural Dynamics (Andreas Wurzinger¹, Florian Kraxberger¹, Bernhard Mayr-Mittermüller⁸, Péter Rucz⁹, Harald Sima⁸, Manfred Kaltenbacher¹ und Stefan Schoder¹)
• Design of Acoustic metamaterials for broadband sound (Manfred Kaltenbacher¹, Dominik Mayrhofer¹, Benedikt Langeder¹ und Stefan Schoder¹)
• Time-Domain Simulation of an Anechoic Duct Termination with Mean Flow (Patrick Heidegger¹, Felix Czwielong¹⁰, Paul Maurerlehner, Stefan Schoder¹, Stefan Becker¹⁰ und Manfred Kaltenbacher¹)
• Modeling the Acoustic Effect of Porous Materials with Physics-Informed Neural Networks (Florian Kraxberger¹, Eniz Museljic¹, Andreas Wurzinger¹, Manfred Kaltenbacher¹ und Stefan Schoder¹)

¹ TU Graz, Institut für Grundlagen und Theorie der Elektrotechnik (IGTE)
² TU Darmstadt, Fachgebiet SAM
³ University of Naples Federico II, Department of Industrial Engineering
⁴ BMW Group
⁵ Fraunhofer LBF
⁶ AIT Austrian Institute of Technology
⁷ TU München, Lehrstuhl für Akustik mobiler Systeme
⁸ Otto Bock Healthcare Products GmbH
⁹ Budapest University of Technology and Economics
¹⁰ FAU Erlangen, Lehrstuhl für Strömungsmechanik

Florian Toth, Stefan Schoder, and Christophe Bogey are organizing a specialized course in computational aeroacoustics at TU Wien. This course is intended for researchers in industry and in academia including Ph.D. Students with a good knowledge of fluid mechanics would like to build up or widen their knowledge in the field of aeroacoustics (modeling, computational tools, and industrial applications). It will provide a comprehensive overview of aeroacoustics theories: 

• Lighthill analogy and vortex sound theory, 
• FWH analogy, 
• hybrid approaches, 
• wave extrapolation methods, 
• duct acoustics

and of the issues of the direct computation of aerodynamic noise using CFD methods:

• Large Eddy Simulation,
• Lattice-Boltzmann Method

A number of practical problems involving the coupling between CFD and CAA will be also thoroughly discussed (e.g. how design a mesh size for aeroacoustics applications, inclusion of mean flow effects via hybrid formulations such as the acoustic perturbation equations, presence of surfaces, aero-acoustic couplings) and realistic applications performed by the instructors (aeronautics, car industry, propulsion, energy) will be discussed. Advanced computational aeroacoustics methods, as well as what we can learn from the direct computation of aerodynamic noise, will also be presented. Finally, specific topics reflecting participant interests will be discussed. 

Lecturers

• Dr Christophe Bogey, Ecole Centrale de Lyon, France
• Prof Gwenael Gabard, LAUM, Le Mans Université, France
• Dr Denis Ricot, CS Group, France (to be confirmed)
• Prof Stefan Schoder, TU Graz, Austria
• Prof Wolfgang Schröder, Institute of Aerodynamics, Aachen, Germany

More information can be found here.

The IGTE is contributing to the 2nd Annual Conference of the Austrian Society for Rheology by the following contribution:

• Shear-induced electrical conductivity changes in disturbed internal flow of human blood
  Alice Reinbacher-Köstinger, Vahid Badeli, Alireza Jafarinia, Thomas Hochrainer, Günter Brenn and Manfred Kaltenbacher

The presentation was awarded the best poster.

Vorstellung aktueller Projekte und Lehrveranstaltungen am IGTE

Infoabend über Forschung und Lehre am IGTE mit Laborführung und gemütlichem Ausklang am 16.11.2023 ab 16:00 Uhr im HS i1.

Wir freuen uns auf den persönlichen Austausch mit interessierten Studierenden,
aus den Studienrichtungen:

The IGTE has contributing to NVHH 2023 by the following plenary talk:

• Aeroacoustics of confined flows and the radiation to the surroundings
  Manfred Kaltenbacher

The IGTE was the host of the OIPE 2023 and has also contributed the following: 

• Adjoint Method for Inverse Problems in Electromagnetics
  (Manfred Kaltenbacher, Barbara Kaltenbacher¹, Andreas Gschwentner, Stefan Ulbrich², Alice Reinbacher-Köstinger)
  ¹University of Klagenfurt, ²TU Darmstadt, Germany
• Surrogate Based Optimization of SMT Ferrite Beads for EMI Filters
  (Christian Riener, Alice Reinbacher-Köstinger, Eniz Museljic, Thomas Bauernfeind, Manfred Kaltenbacher)
• Comparison of a quasi Newton method using Broyden's update formula and an adjoint method for determining local magnetic material properties of electrical steel sheets
  (Andreas Gschwentner, Manfred Kaltenbacher, Barbara Kaltenbacher¹, Klaus Roppert)
  ¹University of Klagenfurt
• Optimization of the Sensor Positions of a Measurement System for the Determination of Local Magnetic Material Properties
  (Alice Reinbacher-Köstinger, Andreas Gschwentner, Eniz Museljic, Christian Magele, Manfred Kaltenbacher)
   

The IGTE is contributing to the EMC Europe 2023 with the following contributions:

• Broadband 3D Modeling and Simulation of DC-Biased SMT Ferrite Beads for EMI Filters 
  (Christian Riener, Thomas Bauernfeind, Klaus Roppert, Samuel Kvasnicka, Bernhard Auinger, Manfred Kaltenbacher)
• Measurement and Simulation Methodology for Characterizing the Shielding Effectiveness of Coating Materials for Optical Sensors 
  (Dominik Kreindl, Bernhard Weiss, Christian Stockreiter, Thomas Bauernfeind, Manfred Kaltenbacher, Martin Faccinelli)

The IGTE is contributing to the Forum Acusticum in Torino with the following contributions:

• Discontinuous Galerkin methods for the acoustic conservation equations with application to aeroacoustic
  (Johannes Heinz, Manfred Kaltenbacher)

  Post-processing flows using physics-informed neural networks
  (Stefan Schoder, Florian Kraxberger, Eniz Museljic, Andreas Wurzinger)

  Optimization of damping properties of acoustic MEMS shutter devices
  (Dominik Mayrhofer, Manfred Kaltenbacher)

  The Nonlinear Eigenfrequency Problem of Room Acoustics with Porous Edge Absorbers
  (Florian Kraxberger, Eniz Museljic, Eric Kurz, Florian Toth, Manfred Kaltenbacher, Stefan Schoder)

  Using eigenmode forcing to investigate flow instability mechanisms causing whistling sound
  (Andreas Wurzinger, Bernhard Mayr-Mittermüller, Manfred Kaltenbacher, Stefan Schoder)

The IGTE is contributing to the ICTCA 2023 with the following contributions:

• Plenary Computational Aeroacoustics of confined flows
  (Stefan Schoder)
• Session Computational acoustics
  (chaired by Stefan Schoder)
• Simulating the Fluid-Structure-Acoustic Interaction of the Confined Flow in a Centrifugal Fan
  (Patrick Heidegger)
• Finite element time domain equivalent fluid model for the acoustic wave equation
  (Paul Maurerlehner)

The IGTE is contributing to the AIAA Aviation 2023 with the following contribution:

• Acoustic Modeling Using the Aeroacoustic Wave Equation Based on Pierce’s Operator
  (Stefan Schoder, Étienne Spieser, Hugo Vincent, Christophe Bogey, and Christophe Bailly)
  (Doi-Link)
• Post-processing subsonic flows using physics-informed neural networks
  (Stefan Schoder, Eniz Museljic, Florian Kraxberger and Andreas Wurzinger)
  (Doi-Link)

The Rita Trowbridge memorial award is given every two years to young researchers presenting their work at the Compumag conference by a committee of the International Compumag Society. This year, Dominik Mayrhofer received commendation as one of the six finalists for the award on May 26th in Kyoto, Japan, for his contribution with the title "Visualization of physical fields with augmented reality in teaching". Dominik Mayrhofer is a doctorate student at the Institute of Fundamentals and Theory in Electrical Engineering. He primarily works on numerical methods for multi-physical simulations of Micro-Electro-Mechanical-Systems (MEMS). Besides multiphysics, he invests much time in teaching and methods to improve the learning experience. The tool developed within this contribution enables the visualization of complex physical fields with augmented reality (AR).

The project, including documentation, can be downloaded and used free of charge for students/educational purposes and is available for other lecturers via GitLab.

The IGTE is contributing to the Compumag 2023 with the following contributions:

• An Improved 3D MHD Equilibrium Formulation (Oszkar Biro, Pietro Testoni, Alfredo Portone)
• Determination of Local Magnetic Material Properties using an Inverse Schemen (Andreas Gschwentner, Klaus Roppert, Manfred Kaltenbacher)
• Visualization of physical fields with augmented reality in teaching (Dominik Mayrhofer, Lucas Alexander Ebner, Clemens Hagenbuchner, Eniz Mušeljić, Paul Baumgartner, Manfred Kaltenbacher)
• Employing AutoDiff and Neural Networks for Parameter Identification of Energy Based Hysteresis Models (Eniz Mušeljić, Klaus Roppert, Alice Reinbacher-Köstinger, Manfred Kaltenbacher)
• Design Optimization of a Sensor-Actuator System to Determine Local Variations of Magnetic Permeability (Alice Reinbacher-Koestinger, Andreas Gschwentner, Klaus Roppert, Eniz Mušeljić, Manfred Kaltenbacher)
• Evaluation of an Analytical Equivalent Hertzian Dipole Representation in TEM-Cells applying the Finite Element Method (Dominik Kreindl, Thomas Bauernfeind, Bernhard Weiss, Christian Stockreiter, Manfred Kaltenbacher)
• Identification of Parameters to correctly adapt Energy-Based Hysteresis Models regarding Rotational Losses (Lukas Daniel Domenig, Klaus Roppert, Andreas Gschwentner, Alexander Sauseng, Manfred Kaltenbacher)
• Multi-Objective Optimization of NFC-Systems: Voltage-Dependent Nonlinear Circuits and their Influence on the System Quality-Factor (Thomas Bauernfeind, Theo Gruber, Samuel Kvasnicka, Eniz Museljic, Alice Reinbacher-Köstinger
• Non-Conforming Isogeometric Nitsche Formulation for the Simulation of Electric Motors (Melina Merkel, Andreas Gschwentner, Klaus Roppert, Sebastian Schöps)
• Broadband Modeling and Simulation of DC-Biased SMT Components in EMI Filters (Christian Riener, Thomas Bauernfeind, Samuel Kvasnicka, Klaus Roppert, Manfred Kaltenbacher)

vlnr. Eniz Museljic (Lehrender), Olga Gorbunova, Florian Weger, Michael Karl Möstl, Paul Wohlmuther, Philipp Alexander Gruber, Christoph Hannes Obenaus (vorne), Felix Klinglmair (hinten), Lilian Bruss, Chiara Sophie Tschuden, Dominik Mayrhofer (Lehrender) – nicht am Bild: Florian Maderecker
(c) Daniel Sittlinger, TU Graz

Um die außergewöhnlichen Studienleistungen zu würdigen, wurden nach Beendigung des Wintersemesters die besten Studierenden der Grundlagen der Elektrotechnik Übung geehrt. Die Würdigung bestand dabei aus einer Urkunde und wahlweise Kernöl, Wein oder Bier.
Die Kolleg:innen haben durch außergewöhnliche Klausurleistungen und guter Mitarbeit während des Semesters bewiesen, dass sie sich mit dem Lehrstoff intensiv auseinandergesetzt haben, und diesen auch umfassend verstanden haben.

Wir gratulieren nochmals den Preisträger:innen und wünschen auch weiterhin viel Erfolg im Studium!