The electromagnetic field generated by capillary drops oscillations

  1. Institute of Applied Physics RAS, Russia

   The exact solution for the full electromagnetic field generated by
   capillary oscillations of a drop of an ideal conducting liquid
   electrically charged and subsninuted to external homogeneous constant
   electric field was found in this report. The calculation of absolute
   spectra of electromagnetic radiation and quasistatic electric field
   generated by a cloud of drops stochastic oscillating at typical clod
   volume and drop density and size distribution was fulfilled. The intensity
   of these fields turn to be much less than the background. Examined the
   situation of the common-mode excitation of oscillations in an ensemble of
   cloud drops, which can take place in the storm clouds, after lightening
   discharges. In this case, the amplitude spectral density of the
   quasi-static electric field generated by drops oscillations in a typical
   thunderstorm cloud at a distance of tens of kilometers from it is
   comparable with the typical level of the spectrum of the electric field
   near storm clouds. Probably, the common-mode excitation of drops can occur
   in the clouds above the centers of seismic activity in moments of sudden
   changes of atmospheric fields.