Back to Search
Start Over
Numerical simulation on the behavior of a negative streamer encountered with a cloud of positive ions in atmospheric pressure plasma jet.
- Source :
-
AIP Advances . Jun2023, Vol. 13 Issue 6, p1-9. 9p. - Publication Year :
- 2023
-
Abstract
- Plasma jet normally operates in a regime of positive or negative streamers. Different propagating behaviors have been investigated for positive streamers. However, there are few studies on negative streamers. In this paper, a two-dimensional fluid model is used to simulate the behavior of a negative streamer encountered with a cloud of positive ions. Simulation results indicate that the negative streamer behaves like a free streamer when the ion cloud has a low charge density. After initiation near the needle tip, the streamer propagates along the axis, passes through the ion cloud, and finally reaches the anode vicinity along a straight line. When the streamer reaches the ion cloud, its head radius (R0) is investigated as a function of parameters, including the voltage amplitude and the gap width, as well as the charge density, axial position, and spatial size of the ion cloud. At a given moment, electric field strength and electron density near the streamer head increase with increasing charge density of the ion cloud. In the case of a high charge-density ion cloud, after a primary streamer propagates some distance along the axis, a positive secondary streamer, and a negative secondary streamer start to propagate from the cloud to the cathode and the anode, respectively. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PLASMA jets
*CATIONS
*ELECTRON density
*COMPUTER simulation
*ELECTRIC fields
Subjects
Details
- Language :
- English
- ISSN :
- 21583226
- Volume :
- 13
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- AIP Advances
- Publication Type :
- Academic Journal
- Accession number :
- 164704915
- Full Text :
- https://doi.org/10.1063/5.0155359