On spatial stabilization of dielectric barrier discharge microfilaments by residual heat build-up in air
| Authors | |
|---|---|
| Year of publication | 2016 |
| Type | Article in Periodical |
| Magazine / Source | The European Physical Journal D |
| MU Faculty or unit | |
| Citation | |
| Web | http://rdcu.be/mRcV |
| Doi | http://dx.doi.org/10.1140/epjd/e2016-70061-5 |
| Field | Plasma physics |
| Keywords | DBD; coplanar DBD; residual heat buid up |
| Description | Microfilaments of dielectric barrier discharge are known for their multiple re-appearance at the same spot on dielectrics. This effect of localized re-appearance is driven by residual excited species and ions, surface charge deposited on the dielectric and the local temperature build-up resulting in the local increase of reduced electric field E/delta N. To assess the magnitude of the latter, the breakdown voltage vs. temperature up to 180 C was carefully measured at coplanar DBD and used as an input into the numerical simulation of heat build-up by the train of discharge pulses. An average reduction of breakdown voltage was found to be 20 V/K. The model predicted a quasi-stable microfilament temperature into which the thermal build-up rapidly converges. Its magnitude agreed well with the reported rotational temperature of similar electrode configuration. The impact of quasi-stable temperature on microfilament formation dynamics is further discussed. |
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