Journal
PLASMA PROCESSES AND POLYMERS
Volume 5, Issue 6, Pages 606-614Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppap.200800035
Keywords
computer modeling; dielectric barrier discharges (DBD); radicals; scanning electron microscopy (SEM); sterilization
Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan
- Japan Science and Technology Agency
- Institute of Fluid Science, Tohoku University
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The mechanisms of generation and transportation of a chemically active species in a tube generated by dielectric barrier discharge have been analyzed by experimental and computational methods to elucidate the sterilization mechanism. The obtained results are: i) Nitrogen oxide is an important sterilization factor. ii) Two-dimensional profiles of emission intensities that expand between the wire and ground in a cross section of the tube were generated by streamer propagation and relaxation processes. iii) A twin vortex was induced in the cross section of the tube by the discharge. Chemically active species, probably transported from the discharge region to the upper region of the tube by the twin vortex, were concentrated by the circular flow.
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