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The group "Allgemeine Elektrotechnik und Plasmatechnik" at the faculty for engineering and information science.

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Interactions Between Flow Fields Induced by Surface Dielectric Barrier Discharge Arrays

This study investigates the flow field induced by a surface dielectric barrier discharge (SDBD) system, known for its efficient pollution remediation of volatile organic compounds (VOCs). We aim to understand the flow dynamics that contribute to the high conversion observed in similar systems using this specific SDBD design. Examining how the surface discharge affects the gas mixing in chemical processes is important for both understanding the fundamentals and for potential industrial applications. Experimental techniques, including schlieren imaging and particle image velocimetry (PIV), applied with high temporal resolution, were used to analyse the flow field. Complementary, fluid simulations are employed to investigate the coupling between streamer and gas dynamics. Results show distinct fluid field behaviours for different electrode configurations, which differ in geometric complexity. The fluid field analysis of the most basic electrode design revealed behaviours commonly observed in actuator studies. The simulation results indicate the local information about the electron density as well as different temporal phases of the fluid flow velocity field containing the development of the experimental found vortex structure, its direction and speed of rotation. The electrode design with mostly parallel grid line structures exhibits confined vortices near the surface. In contrast, an electrode design also used in previous studies, is shown to promote strong gas transport through extended vortex structures, enhancing gas mixing and potentially explaining the high conversion observed.

Release Date
Permanent Identifier (URI)
Is supplementing
Plasma Source Name
Plasma Source Application
Plasma Source Specification
Plasma Source Properties
11 kV peak to peak voltage, max 100 watts per electrode
English (United Kingdom)
Plasma Source Procedure
Turn the plasma source and camera on at the same point in time to record the starting phase. Between the measurements the experimentalists waited for 5 minutes to ensure that no heating effects from previous measurement play a role.
Plasma Medium Name
Plasma Medium Properties
Quiescent air
Plasma Target Name
Contact Name
Böddecker, Alexander
Plasma Target Properties
Plasma Target Procedure
The air surrounding the SDBD has to be seeded with aerosols for preparing the PIV measurements. 5 min of waiting time are necessary, to ensure that the air is not moving in a way that the measurements could be influenced.
Contact Email
Plasma Diagnostic Properties
All details can be found in the paper, that is published with Open Access.
Public Access Level
Plasma Diagnostic Name
Funding Agency

Data and Resources

POLYGON ((7.266458272934 51.447697723635, 7.2640550136566 51.446948827322, 7.2648918628693 51.446052810236, 7.2674024105072 51.446868587702))
Chair of Applied Electrodynamics and Plasma Technology, Ruhr University Bochum, Universitätsstraße 150, 44801 Bochum, Germany
temporal and spatial resolution, all data available in the paper
Project Contact Name: 
Mussenbrock, Thomas