Large electric fields in acoustic waves and the stimulation of lightning discharges

Details Large electric fields in acoustic waves and the stimulation of lightning discharges Large electric fields in acoustic waves and the stimulation of lightning discharges

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387..364p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 387, March 1, 1992, p. 364-371.

Statistics

Computation

16

Electric Discharges, Electric Fields, Lightning, Solar System Evolution, Sound Waves, Chondrule, Computational Astrophysics, Gas Ionization, Metal Ions, Plasma Dynamics, Wave Propagation

Scientific paper

The electric fields produced in linear acoustic waves are calculated in order to determine the conditions, including the required ionization structure, characteristic flow parameters, and solid particle size distribution, necessary for the production of large electric fields. This approach is examined in the context of the protosolar nebula where lightning may have been important for the thermal evolution of chondrules. It is found that electric field strengths strong enough to induce lightning discharges could be produced in waves in that environment but that the electrical energy in such a structure was far too small for significant heating and ionization to occur in the discharge channels associated with the wave. It is inferred that lightning discharges in the protosolar nebula, if they were responsible for the melting of chondrules, must have been powered by electrical energy stored in much larger structures. It is argued that the strong electric fields in waves may have provided the 'seed conditions' for nonlinear charging of those large grains.

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