https://opendata.uni-halle.de//handle/1981185920/13535 2026-04-08T17:36:35Z 2026-04-08T17:36:35Z Tsotsas, Evangelos https://opendata.uni-halle.de//handle/1981185920/123612 2025-12-13T02:10:42Z 2025-01-01T00:00:00Z

Title: Ultrathin coating of fluidized particles by means of aerosol Author(s): Tsotsas, Evangelos

2025-01-01T00:00:00Z Thévenin, Dominique Scherer, Viktor https://opendata.uni-halle.de//handle/1981185920/120884 2025-08-29T01:03:50Z 2025-01-01T00:00:00Z

Title: 2nd international workshop on reacting particle-gas systems : modelling and experimental characterization of reactive particle-gas systems Author(s): Thévenin, Dominique; Scherer, Viktor Editors: Thévenin, Dominique

2025-01-01T00:00:00Z Patel, Bansidhar Kanubhai https://opendata.uni-halle.de//handle/1981185920/103283 2023-03-09T02:12:43Z 2023-01-01T00:00:00Z

Title: Application of Loewner framework for data-driven modeling and diagnosis of polymer electrolyte membrane fuel cells Author(s): Patel, Bansidhar Kanubhai Abstract: Environmental and resources problems have been the driving force behind the development of fuel cell technologies. The polymer electrolyte membrane fuel cell (PEMFC) is one of the highly promising fuel cells in terms of delivering energy requirements for a vast number of applications. Nevertheless, its commercialization has been restricted because of its limited durability and reliability. In order to enhance its performance, effective modelling, and diagnostic strategies are essential. Several technologies are employed to investigate the various degradation mechanisms occurring in the PEMFC. Among them, electrochemical impedance spectroscopy (EIS) is the most widely employed method. Nevertheless, it is not able to distinguish processes having a similar time constant, and thus alternative frequency response analysis (FRA) techniques have recently been developed involving non-electrical inputs and/or outputs, for instance, the concentration-alternating frequency response analysis (cFRA). However, these methodologies have required a longer period of experiments and their results are difficult to interpret, which requires complex models to understand them. In order to tackle such challenges, the data-driven based approach, known as the Loewner Framework, is adopted in this thesis. Applying the Loewner framework, a new methodology is developed as a complementary analysis technique for interpreting EIS and cFRA data of the PEMFC. This novel method allows the identification of the different features of the individual physicochemical phenomena in a very clear manner and facilitates the decoupling of processes with comparable time constants. In addition, the cFRA experiment data are analysed by using the Loewner framework in order to shorten the duration of the experiments, and the results show the feasibility of a significant amount of time reduction of the cFRA experiments.

2023-01-01T00:00:00Z Martins, Fabio J. W. A. Kronenburg, Andreas Beyrau, Frank https://opendata.uni-halle.de//handle/1981185920/103140 2023-02-14T02:12:23Z 2021-01-01T00:00:00Z

Title: Single-shot two-dimensional multi-angle light scattering (2D-MALS) technique for nanoparticle aggregate sizing Author(s): Martins, Fabio J. W. A.; Kronenburg, Andreas; Beyrau, Frank Abstract: The two-dimensional multi-angle light scattering (2D-MALS) technique has been extended for single-shot size measurements of soot aggregates in flames. Six cameras are used for instantaneous acquisition of the elastic scattering from the aggregates at different directions between 10 to 90◦ of a laser light sheet. Two diluted ethylene (50 and 60% by volume of C 2 H 4 fuel diluted with inert N 2 ) coflow laminar diffusion flames with little flickering are used as proof of concept. Results of instantaneous, average and fluctuating 2D fields of the effective radii of gyration, which are expected to characterize the size of the aggregates, compare well with the literature, demonstrating the applicability of the proposed sizing method to weakly unsteady combustion processes.

2021-01-01T00:00:00Z