|Figure 1: 4th-power-law example. |
Figure 1: Attached central needle has length
fifteen grid steps. The threshold (cutoff) voltage is set
at 0.0700, just slightly below the largest voltage on
a neighbor site to the needle. 20089 (est.) statistical tries
have produced 956 discharged links. Growth across the second
half of the point-to plane gap occurs in about 1/16 of the
entire ``Monte Carlo" elapsed time. This speedup is a result
of the low, screened initial field near the originating
electrode, and the high power law assumed in the model.
|Figure 2: 2nd-power-law example. |
Square-law streamer simulation.
314 statistical tries have given rise to 1832 discharged links.
The needle has been lengthened to 47 grid intervals, which more closely
simulates the ``point-to-plane" configuration. Threshold (cutoff) voltage level
is set at 0.2000, just slightly below the largest neighbor voltage adjacent
to the needle tip.
|Figure 3: linear-power-law example. |
Linear response law. Growth is dense. 91 statistical tries
have produced 27,837 discharged links. The front of the growth, facing
the counterelectrode, has become rounded and brush-like; this
rounding counteracts the field enhancement from the diminished
gap distance, so that forward growth proceeds at a nearly
constant rate. The upper envelope of growth is a flat cone,
almost level with the tip of the needle.
|Figure 4: Immersive visualization simulation. |
Figure 4: Immersive visualization demo.
This demo is in OpenGL Performer binary format. It may be viewed with
perfly from SGI, or with
diversifly which is part of the DIVERSE package
from Virginia Tech.
Figure 5: Movie of growth of a streamer tree in a breakdown process.
Mpeg (1.6 MB)