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- W1520564401 abstract "Bunches of streamers form the early stages of sparks and lightning but theory presently concentrates on single streamers or on coarse approximations of whole breakdown trees. Here a periodic array of interacting streamer discharges in a strong homogeneous electric field is studied in density or fluid approximation in two dimensions. If the period of the streamer array is small enough, the streamers do not branch, but approach uniform translation. When the streamers are close to the branching regime, the enhanced field at the tip of the streamer is close to 2Einfinity, where Einfinity is the homogeneous field applied between the electrodes. We discuss a moving boundary approximation to the density model. This moving boundary model turns out to be essentially the same as the one for two-fluid Hele-Shaw flows. In two dimensions, this model possesses a known analytical solution. The shape of the two-dimensional interacting streamers in uniform motion obtained from the PDE simulations is actually well fitted by the analytically known selected Saffman-Taylor finger. This finding helps to understand streamer interactions and raises new questions on the general theory of finger selection in moving boundary problems." @default.
- W1520564401 created "2016-06-24" @default.
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- W1520564401 date "2008-07-11" @default.
- W1520564401 modified "2023-10-09" @default.
- W1520564401 title "Saffman-Taylor streamers: Mutual finger interaction in spark formation" @default.
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- W1520564401 doi "https://doi.org/10.1103/physreve.78.016206" @default.
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