Výbojové plazma vytvořené v oblasti hydrodynamické kavitace na rozhraní kapalné a plynné fáze kavitačního mraku v kapalině představuje perspektivní možnost v čištění kontaminovaných vod od patogenních mikroorganismů nebo chemických polutantů. Mechanismy a parametry tohoto komplexního fyzikálního fenoménu jsou však prozkoumány a známy jen velmi rámcově. Dobré teoretické základy pochopení těchto jevů umožní optimalizaci parametrů kavitace a elektrických výbojů pro úpravu kapalin při využití tzv. pokročilých oxidačních procesů. Navrhovaná spolupráce odborníků umožní studium tohoto fenoménu a pochopení komplexní provázanosti dějů, které zde probíhají.

Description in English
Proper decontamination of polluted water from dangerous microorganisms is essential in many areas of environmentally sustainable management of shrinking water resources. Our new solution based on the synergistic effect of supercavitation and plasma discharge proved to be very effective even compared to other advanced oxidation technologies. However, it preceded the basic research and even opened a completely new research area. The project aims to study various ways of supercavitation generation (sudden constriction, flow around an obstacle, supercavitation in the vortex core) and its impact on the generation of discharge plasma, addressing both physical phenomena and biocidal effects. The elucidation of the complex mutual interactions scheme of the supercavitation environment sustained formation of discharge plasma will provide the demanded knowledge base for any further advancement of targeted disinfection effects (and not only). The project will be implemented in close multidisciplinary cooperation of mechanical engineers, physicists, and biologists.

Keywords
hydrodynamická kavitace;nízkoteplotní plazma;dezinfekční účinek

Key words in English
hydrodynamic cavitation, low-temperature plasma, disinfection effect

22-11456S

Czech

Rudolf Pavel, doc. Ing., Ph.D. - principal person responsible

Energy Institute
- responsible department (14.4.2021 - not assigned)
Energy Institute
- beneficiary (14.4.2021 - not assigned)

PALIKOVA, M.; VAIBAROVA, V.; STAHEL, P.; CECH, J.; TOULOVA, I.; MIKULIKOVA, I.; NOVOTNA, H.; PIKULA, J.; MENDEL, J.; RUDOLF, P.; MARSALEK, B.; PAPEZIKOVA, I. Elimination of pathogenic Aeromonas and Flavobacterium strains in the aquatic environment using CaviPlasma. BMC Microbiology, 2025, vol. 25, no. 1, 9 p.
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HORNAK, R.; CECH, J.; ST'AHEL, P.; PROKES, L.; TRUNEC, D.; RUDOLF, P.; MARSALEK, B. Spatial Mapping of OH Radicals Produced by Electric Discharge in Hydrodynamic Cavitation Cloud. Journal of Physical Chemistry Letters, 2025, vol. 16, no. 25, p. 6279-6285.
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RUDOLF, P.; POCHYLÝ, F.; ST'AHEL, P.; MARSALEK, B.; BALKO, M.; CECH, J.; HUDEC, M.; PROKES, L.; MARSALKOVA, E. Hydrodynamic cavitation and cold plasma: Innovative approaches for water treatment and disinfection. In IOP Conference Series-Earth and Environmental Science. IOP Conference Series: Earth and Environmental Science. BRISTOL: Iop Publishing Ltd, 2025. 6 p.
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BALKO, M.; RUDOLF, P.; MONKOVÁ, P. Hydraulic characteristics of the convergent-divergent nozzle with the inner electrode in cavitating conditions. MATEC Web of Conferences, 22nd Conference on Power System Engineering. 2023. 7 p.
Detail

RUDOLF, P.; SŤAHEL, P.; MARŠÁLEK, B.; ČECH, J.; RÁHEĽ, J.; PROKEŠ, L.; MARŠÁLKOVÁ, E.; BALKO, M. Synergistic effect of hydrodynamic cavitation and cold plasma discharge for water treatment and pollutants removal. Proceedings of ESS2022 17th Meeting of European Society of Sonochemistry. 2022. p. 13-14.
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ZEMAN, R.; RUDOLF, P. Hydrodynamic cavitation in minifluidic Venturi nozzle. In EFM22 – Experimental Fluid Mechanics 2022. EPJ Web of Conferences. EDP Sciences, 2024. no. 1, p. 1-5. ISBN: 9781713899730. ISSN: 2100-014X.
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ČECH, J.; SŤAHEL, P.; PROKEŠ, L.; TRUNEC, D.; HORŇÁK, R.; RUDOLF, P.; MARŠÁLEK, B.; MARŠÁLKOVÁ, E.; LUKEŠ, P.; LAVRIKOVA, A.; MACHALA, Z. CaviPlasma: parametric study of discharge parameters of high-throughput water plasma treatment technology in glow-like discharge regime. Plasma sources science & technology, 2024, vol. 33, no. 11, p. 1-21. ISSN: 1361-6595.
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RUDOLF, P. Kavitace - jev negativní i pozitivní (experimenty a výpočtové modelování). Praha: Techsim Engineering s.r.o., 2022. s. 1-27.
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RUDOLF, P.; SŤAHEL, P.; MARŠÁLEK, B.; POCHYLÝ, F.; ČECH, J.; RÁHEĽ, J.; MARŠÁLKOVÁ, E. CaviPlasma - nová technologie pro pokročilou oxidaci na základě hydrodynamické kavitace a nízkoteplotního plazmatu. Sborník konfrence s mezinárodní účastí Řešení extrémních požadavků na čištění odpadních vod. Brno: Czech Water Association, 2022. s. 1-12. ISBN: 978-80-11-01511-4.
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SIKORA, P.; FIALOVÁ, S.; POCHYLÝ, F.; MARŠÁLKOVÁ, E. Theoretical framework and preliminary experimental evaluation of magnetically enhanced production of hydroxyl radicals in cavitating flows for wastewater treatment. Journal of Ecological Engineering, 2026, vol. 27, no. 3, p. 274-287.
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CECH, J.; STAHEL, P.; PROKES, L.; TRUNEC, D.; HORNAK, R.; RUDOLF, P.; MARSALEK, B.; MARSALKOVA, E.; LUKES, P. Glow discharge in water cavitation cloud with improved efficiency for hydrogen peroxide production. Plasma sources science & technology, 2025, vol. 34, no. 6, 18 p.
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BURDA, R.; RUDOLF, P.; ZEMAN, R.; BALKO, M. CFD investigation on the effect of turbulence models on pressure fluctuations in Venturi nozzle. In IOP Conference Series-Earth and Environmental Science. IOP Conference Series: Earth and Environmental Science. BRISTOL: Iop Publishing Ltd, 2025. 6 p.
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ODEHNALOVÁ, K.; ČECH, J.; MARŠÁLKOVÁ, E.; SŤAHEL, P.; MAYER, B.; SANTANA, V.; RUDOLF, P.; MARŠÁLEK, B. Exploring the dynamics of reactive oxygen species from CaviPlasma and their disinfection and degradation potential — the case of cyanobacteria and cyanotoxins. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2025, vol. 2, no. 32, p. 849-863.
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Responsibility: Rudolf Pavel, doc. Ing., Ph.D.