Viscous droplet in nonthermal plasma: Instability, fingering process, and droplet fragmentation

POTOČŇÁKOVÁ, Lucia, Petr SYNEK and Tomáš HODER. Viscous droplet in nonthermal plasma: Instability, fingering process, and droplet fragmentation. Physical Review E. College Park: APS, 2020, vol. 101, No 6, p. 1-15. ISSN 2470-0045. Available from: https://dx.doi.org/10.1103/PhysRevE.101.063201.

Basic information

• Original name: Viscous droplet in nonthermal plasma: Instability, fingering process, and droplet fragmentation
• Authors: POTOČŇÁKOVÁ, Lucia (703 Slovakia, belonging to the institution), Petr SYNEK (203 Czech Republic, belonging to the institution) and Tomáš HODER (203 Czech Republic, guarantor, belonging to the institution).
• Edition: Physical Review E, College Park, APS, 2020, 2470-0045.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10305 Fluids and plasma physics
• Country of publisher: United States of America
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 2.529
• RIV identification code: RIV/00216224:14310/20:00115786
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.1103/PhysRevE.101.063201
• UT WoS: 000537171800020
• Keywords in English: viscous droplet; nonthermal plasma; Hele-Shaw cell; instability
• Tags: rivok
• Tags: International impact, Reviewed

Abstract

The interaction of dielectric barrier discharge plasma and silicone-oil liquid droplet in a Hele-Shaw cell was investigated experimentally employing synchronized optical and electrical time-resolved measurements. Temporal development of the destabilization, stretching, and fragmentation of the plasma-liquid interface was studied for the whole event lifespan. The perturbation wavelength and temporal development of fingering speed, plasma-liquid interface length, mean transferred charge, and fractal dimension of the pattern were determined. Recorded changes in the dissipated mean power show a strong correlation to subsequent stretching of the interface, opening new methodological possibilities for future investigations. Our extensive parametric study shows that oil viscosity and applied voltage amplitude both have a significant impact on the interface evolution. Notably, at relatively high voltages the destabilized interface featured properties noticeably diverging from the theoretical prediction of a known model. We propose an explanation based on the change of the liquid viscosity with increased heating at high applied voltage amplitudes.

Links

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