Abstract:
Variation of fractal dimension of long laboratory
sparks were studied using high speed video recordings and still
images. Four sparks were selected for the study, including both
positive and negative polarities in lightning and switching
impulses. Temporal and spatial variation of fractal dimension
was studied. It was found that the fractal dimension is maximum
at the breakdown. No particular pattern was observed for the
variation of fractal dimension along the channel. Results show
that the value of fractal dimension depends on the angle of view.
