Hydrodynamic effects in liquids subjected to pulsed low current arc discharges

E. Gidalevich*, R. L. Boxman, S. Goldsmith

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Hydrodynamic phenomena in liquids associated with low current electrical discharges were analysed theoretically and the radial plasma column expansion was considered as an arbitrary discontinuity propagation. For assumed initial discharge channel radii of R0 = 10-6 and 10-5 m, the initial temperatures in the discharge channel was found to be T 0 = 1.4 × 106 and 6.5 × 104 K for a discharge current of I = 1 A, and T0 = 6.5 × 106 and 3 × 105 K for I = 10 A. The temperature decreases during the initial ∼10-8 s, due to radial plasma column expansion. During the initial 10-8 s the velocity of the plasma column expansion exceeds the speed of sound in the undisturbed water (by 5-15 times), creating a shock wave in the water with a pressure discontinuity of ≈105 atm, and a relaxation length of 10-4 m.

Original languageEnglish
Pages (from-to)1509-1514
Number of pages6
JournalJournal of Physics D: Applied Physics
Volume37
Issue number10
DOIs
StatePublished - 21 May 2004

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