Chao Li et al 2008 J. Phys. D: Appl. Phys. 41 032005 doi:10.1088/0022-3727/41/3/032005
Spatial coupling of particle and fluid models for streamers: where nonlocality matters
FREE ARTICLEChao Li1, Ute Ebert1,2, W J M Brok1,2 and Willem Hundsdorfer1
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Particle models for streamer ionization fronts contain correct electron energy distributions, runaway effects and single electron statistics. Conventional fluid models are computationally much more efficient for large particle numbers, but create too low ionization densities in high fields. To combine their respective advantages, we here show how to couple both models in space. We confirm that the discrepancies between particle and fluid fronts arise from the steep electron density gradients in the leading edge of the fronts. We find the optimal position for the interface between models that minimizes the computational effort and reproduces the results of a pure particle model.
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Issue 3 (7 February 2008)
Received 16 October 2007, in final form 12 December 2007
Published 8 January 2008
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Spatial coupling of particle and fluid models for streamers: where nonlocality matters
Chao Li et al 2008 J. Phys. D: Appl. Phys. 41 032005
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