Evaluation of critical volume in strongly inhomogeneous electric fields



Abstract. On the basis of an experimental study of the dielectric strength of air with different densities and for inter-electrode distances of 1 and 2 cm, we evaluated by simulation, the variation of critical volume based on the of electric potential difference applied to a system “point-plane” electrodes in which the field is highly non-homogeneous. The boot discharge delay time, the mode of evolution of the landfill and the probability of the dielectric strength are resulting from the value of this volume. We also took into account the change in net ionization coefficient on the likely path of the discharge between the two electrodes. The results confirm that in strongly inhomogeneous field, the critical volume in positive polarity is slightly different from the volume of the ionization zone and increases exponentially with the applied voltage.

Electric Field, Free Electrons, Critical Volume, Net Ionization Coefficient, Electrical Discharge

Published online 12/10/2016, 4 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: I. ADJIM, N. ADJIM, ‘Evaluation of critical volume in strongly inhomogeneous electric fields’, Materials Research Proceedings, Vol. 1, pp 143-146, 2016
DOI: http://dx.doi.org/10.21741/9781945291197-36

The article was published as article 36 of the book Dielectric Materials and Applications

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