Institutional Project FESB

About the Project

MULTIMOD

ADVANCED MODELING AND MEASUREMENT METHODS IN MULTIPHYSICS ENGINEERING PROBLEMS

Within the framework of the project’s research activities, the focus is on advanced numerical modeling and measurement methods for the analysis of multiphysics engineering problems. The project activities are directed toward the development of formulations and corresponding numerical solution methods in the fields of bioelectromagnetism (with particular emphasis on 5G systems), biomedical applications of electromagnetic fields, ground-penetrating radar, plasma physics, fusion technology, space technologies, accelerator systems, wireless power transfer and electromagnetic compatibility, energy efficiency, stochastic processes in advanced communication networks, as well as the application of artificial intelligence and IoT systems in healthcare, and the implementation and monitoring of smart environments using energy-efficient IoT systems. The project integrates established research groups at FESB that develop numerical methods across diverse scientific fields and are involved in numerous domestic and international projects, ranging from bilateral initiatives to large collaborations such as research within EUROfusion. These groups possess substantial knowledge, experience, and research software. The project aims to consolidate these somewhat dispersed capacities, resulting in the collection and integration of knowledge, experience, developed software, and equipment within a single operational platform. Finally, in the next phase, beyond the integration of these capacities, the project is expected to generate added value through the creation of multidisciplinary knowledge and the hybridization of existing numerical methods, as well as the development of new, more efficient numerical approaches. These methods will be validated and subsequently tested on a range of problems in engineering and natural sciences.

Goals

Project Goals

By linking human resources, including their expertise and available equipment, opportunities will be created to form strong multidisciplinary teams. Such teams will significantly contribute to generating new value at FESB and the University of Split through scientific achievements and the attainment of key objectives. This includes the submission of international project proposals, publication of high-quality scientific papers, development of software solutions, and addressing specialized challenges of the industry at both local and national levels. Furthermore, this collaboration will enhance education by designing new, modern, multidisciplinary courses accessible to students across all affiliated units of the University of Split.

The fundamental objective of this institutional project is the development of formulations, models, and advanced numerical methods, which will result in the creation of software for multiphysics problems in the identified areas of interest. Wherever feasible, corresponding measurement procedures will be developed in parallel.

Work Packages

WP1

Analysis of Human Exposure to Electromagnetic Fields

• Deterministic modeling of human exposure to low-frequency fields using advanced numerical methods.

• Deterministic modeling of human exposure to high-frequency fields using advanced numerical methods. • Stochastic modeling of human exposure to low-frequency fields. • Stochastic modeling of human exposure to high-frequency fields. • Thermal dosimetry using deterministic-stochastic methods. • Development of new electromagnetic-thermal dosimetry methods for 5G systems. • Development of new dosimetry methods for incident field exposure from 5G radiation. • Analysis of the relationship between incident field dosimetry and electromagnetic-thermal dosimetry with respect to energy consumption and energy efficiency of 5G base stations and future-generation base stations (B5G). • Measurement procedures for determining the interdependence of electromagnetic radiation levels, energy consumption, and energy efficiency of wireless communication network devices in 2G/3G/4G/5G, B5G networks, and wireless local area networks (WLAN).

WP2

Biomedical Applications of Electromagnetic Fields

• Deterministic modeling of brain exposure to electromagnetic fields during transcranial magnetic stimulation (TMS) using the method of moments, and during transcranial electrical stimulation (TES) using the boundary element method. • Stochastic modeling of brain exposure during TMS and TES using stochastic collocation. • Deterministic modeling of nerve electrical stimulation (PENS and TENS) using transmission line and antenna theory. • Stochastic modeling of nerve electrical stimulation (PENS and TENS) using stochastic collocation. • Stochastic modeling of microwave thermal ablation to understand parameters affecting therapy outcomes (e.g., input power, tissue heterogeneity, perfusion).

WP3

Wireless Power Transfe

• Analysis of radio channels for wireless power transfer between helical antennas via resonant coupling at medium distances, using stochastic electromagnetic methods. • Analysis of human exposure to electromagnetic fields during wireless power transfer. • Analysis of wireless power transfer in frequency and time domains using antenna theory. • Analysis of wireless power transfer and energy efficiency of wireless power systems (optimization of transmitted vs. consumed energy). • Measurement procedures for wireless power transfer

WP4

Ground-Penetrating Radar Analysis

• Deterministic modeling of frequency response of antenna systems used in ground-penetrating radar by solving spatial-frequency Pocklington-type integral equations. • Deterministic modeling of transmitted fields in lossy media in the frequency domain. • Stochastic modeling of frequency response of antenna systems used in GPR using stochastic collocation. • Stochastic modeling of transmitted fields in lossy media in the frequency domain. • Deterministic modeling of the time-domain response of antenna systems in GPR by solving spatially-time-dependent Hallen-type integral equations. • Deterministic modeling of transmitted fields in lossy media in the frequency domain. • Stochastic modeling of the time-domain response of antenna systems in GPR using stochastic collocation. • Stochastic modeling of transmitted fields in lossy media in the time domain. • Development of a GPR system analysis method using Time Reversal techniques. • Development of a GPR analysis method using multilayer soil models and corresponding reflection coefficients. • Development of a method for analyzing the interdependence between transmitted field power and the energy efficiency of Ground-Penetrating Radar (GPR) systems using multilayer soil models and corresponding reflection coefficients.

WP5

Plasma Physics, Fusion, Accelerator Systems, and Space Technology

• Development of advanced deterministic numerical methods (finite element and boundary element method variants) for solving magnetohydrodynamic differential equations (Grad-Shafranov and current diffusion equations along with other transport equations) used in fusion research for tokamak analysis. • Stellarator modeling. • Stochastic analysis methods in plasma physics and accelerator systems. • Stochastic analysis methods for neutron beams. • Electromagnetic compatibility methods in accelerator systems. • Applications of plasma physics in space technology. • Analysis and optimization of energy efficiency in fusion systems (Q-factor) and individual components (stellarator, accelerator, etc.). • Network-free Monte Carlo modeling of heat transport in stellarators.

WP6

Electromagnetic Compatibility

• Deterministic modeling of lightning channels using antenna theory. • Deterministic modeling of grounding systems for wind turbines using antenna theory. • Stochastic modeling of lightning channels using antenna theory. • Stochastic modeling of grounding systems for wind turbines using antenna theory. • Modeling of realistic antenna systems for air traffic control applications. • Modeling of heat transfer in power cables – electro-thermal models. • Electromagnetic compatibility in wireless electric vehicle charging – modeling and corresponding measurement procedures. • Analysis of wireless power transfer, electromagnetic compatibility, and energy efficiency of wired and wireless EV charging stations. • Broadband measurements, modeling, and characterization of lightning strikes with emphasis on wind turbine impacts. • Analysis of fast processes and X-ray emissions in upward lightning from tall structures. • Modeling and measurement of transient electromagnetic phenomena in the transmission section of the power grid.

Project Team

Project Leader: prof. dr. sc. Dragan Poljak

prof. dr. sc. Dragan Poljak

Project Leader

Zoran Blažević

Researcher

Vicko Dorić

Researcher

Toni Perković

Researcher

Joško Radić

Researcher

Maja Škiljo

Researcher

Petar Šolić

Researcher

Maja Štula

Researcher

Anna Šušnjara Nejašmić

Researcher

Klementina Vidjak

Researcher

Josip Lerinc

Researcher

Mario Cvetković

Researcher

Tonko Garma

Researcher

Nikša Kovač

Researcher

Silvestar Šesnić

Researcher

Antonio Šunjerga

Researcher

Josip Bašić

Researcher

Dinko Begušić

Researcher

Katarina Babić

Researcher

Marko Pilić

Researcher

Contact

For all enquiries related to the MULTIMOD project, please contact the project leader:

prof. dr. sc. Dragan Poljak Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture University of Split Ruđera Boškovića 32, 21000 Split, Croatia

E-pošta: Dragan.Poljak@fesb.hr