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Transcript
case with a peak at the 6 o'clock position. This corresponds to the location of highest
electric field strength. The jagged charge density trace is indicative of the instability
inherent in the high sensitivity charge injection boundary condition parameters.
Corresponding plots for the collector electrode are shown in figure 4-22c. The
current is collected primarily on the upper half of the collector. The critical field
strength for the collector is E,
=
46.64 kV/cm. The maximum field strength on the
collector is less than half of the critical value; this indicates that a negative corona at
the collector is not likely.
While the low sensitivity charge injection results presented here do not reproduce
the experimental results, the fact that the high sensitivity model is a better match
indicates that the charge injection model is tunable to balance accuracy and solution
stability. The stability of the model will increase with mesh density since the sharper
changes in current flux can be more accurately represented.
The present study is
limited by the resources available on a personal computer or desktop. A mainframe
or server would be required to perform computations for larger models.
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