Publication details
Viscous droplet in nonthermal plasma: Instability, fingering process, and droplet fragmentation
| Authors | |
|---|---|
| Year of publication | 2020 |
| Type | Article in Periodical |
| Magazine / Source | Physical Review E |
| MU Faculty or unit | |
| Citation | |
| web | https://journals.aps.org/pre/abstract/10.1103/PhysRevE.101.063201 |
| Doi | http://dx.doi.org/10.1103/PhysRevE.101.063201 |
| Keywords | viscous droplet; nonthermal plasma; Hele-Shaw cell; instability |
| Description | 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. |