Investigation of ignition of positive corona discharge in air using a time dependent fluid model
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F25%3APU156139" target="_blank" >RIV/00216305:26220/25:PU156139 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1361-6595/adb518" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6595/adb518</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6595/adb518" target="_blank" >10.1088/1361-6595/adb518</a>
Alternative languages
Result language
angličtina
Original language name
Investigation of ignition of positive corona discharge in air using a time dependent fluid model
Original language description
The time dynamics of positive corona ignition from an initial seed electron to the appearance of space charge effects is studied at atmospheric pressure in a spherically symmetrical geometry. The time-dependent model incorporates a recent photoionization model and boundary conditions to properly treat the corona discharge in the proximity of the anode surface. The applied voltage satisfying the self-sustainability condition of the discharge is first calculated. Then, the time dynamics of the discharge is studied for higher and lower applied voltages. The exponential growth in electron density is identified before space charge effects significantly shield the applied electric field. The related characteristic time of exponential growth in electron density is calculated as a function of applied voltage. The time scale can be tens of nanoseconds when applied voltage is close to the threshold or less than one nanosecond when increasing voltage 10% above the threshold for atmospheric pressure. Analogous to the equality of ionization timescale and dielectric relaxation time in stable streamers, a characteristic timescale is used to predict the behavior of the discharge. When the characteristic time is about one-tenth of the dielectric relaxation time, a one-tenth reduction in the applied field on the anode is observed. As the dielectric relaxation time drops below ten times the characteristic time, the discharge behavior diverges for different applied voltages, and the characteristic time is not a good predictor of further discharge dynamics.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10300 - Physical sciences
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Plasma Sources Science and Technology
ISSN
0963-0252
e-ISSN
1361-6595
Volume of the periodical
34
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
„“-„“
UT code for WoS article
001431430600001
EID of the result in the Scopus database
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