Ball lightning an electromagnetic knot?
Article Abstract:
A theoretical model of ball lightning exploits the concept of electromagnetic knot to predict the behaviour of radiated energy as par the Stefan-Boltzmann law. A magnetic knot formed by lightning is characterized by high ionization/temperature giving rise to infinite conductivity. The motion under this infinitely conductive situation may be adequately described by magnetohydrodynamical approximations. The ball dissipates energy by nominal expansion, but helicity conservation inhibits the decay process. Changes in the ball temperature/resistivity cause helicity loss/structure dissipation.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Stable knot-like structures in classical field theory
Article Abstract:
It has been possible to use numerical algorithms in powerful computers to investigate a model of stable knot-like structures. As a result, considerable evidence has been produced for the existence of the doughnut-shaped unknot vortex. Furthermore, there is also evidence to suggest the existence of a trefoil vortex. It seems that there are several experimental and theoretical situations in which stable knot-like structures may be relevant. Most significantly, they may have physical implications for the cosmology of the early Universe.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Ball lightning caused by oxidation of nanoparticle networks from normal lightning strikes oil soil
Article Abstract:
Ball lightning usually occurs during stormy weather and many energy sources have been proposed to explain the light. However none of the models explain all of the observed characteristics. A model has been developed that could account for all of the properties. Soil samples were exposed to a lightning-like discharge, producing chain aggregates of nanoparticles which oxidized at a rate appropriate to explain the lifetime of ball lightning.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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