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Visualization and analysis of coupling between plasmas self-organization and plasma-induced fluid circulation in 1 atm DC glows with liquid anode
- Source :
- Journal of Applied Physics. 129:163303
- Publication Year :
- 2021
- Publisher :
- AIP Publishing, 2021.
-
Abstract
- In plasma–liquid interactions, the phenomenon of induced liquid flow that originates at the plasma–liquid contact point is important in that it influences mass, charge, and heat transport from the source to the surrounding bulk fluid. Such stimulated flows have been observed in 1 atm glows with a liquid anode. Because the plasma contact point in such discharges is patterned, a natural question is what is the relationship between the observed self-organized patterns and the induced flow field? It is, therefore, of great interest to investigate the coupling mechanism between the self-organization patterns in an atmospheric pressure dc helium glow discharge with a liquid anode and the induced flow circulation. Particle imaging velocimetry is used to probe the flow fields in the plane normal and parallel to the plasma–liquid interface. A strong ascending flow with maximum speed up to 1.5 cm/s and circulation vortices nearby are observed in the plane normal to the interface centered at the plasma attachment. The experiment results suggested that the ascending flow is caused by water evaporation and the vortices are formed by viscous stress. With a self-organization pattern formed, the flow structures become non-static and the circulation vortices are observed to periodically form and decay. In the plane parallel to the interface, a strong swirl flow was found to exist only when the plasma attachment is self-organized. The analysis revealed that the driving mechanism could be the electrohydrodynamics force. Averaged flow velocity over time in the field of view was found to scale linearly with increasing input power and increasing liquid conductivity.
- Subjects :
- 010302 applied physics
Glow discharge
Materials science
Atmospheric pressure
General Physics and Astronomy
chemistry.chemical_element
02 engineering and technology
Plasma
Mechanics
021001 nanoscience & nanotechnology
01 natural sciences
Vortex
Anode
Physics::Fluid Dynamics
chemistry
Flow velocity
Physics::Plasma Physics
0103 physical sciences
Electrohydrodynamics
0210 nano-technology
Helium
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 129
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........8fd213ec83be96649501ecd76cabda5e