Lenard Effect

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Lenard Effect

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The separation of electric charges accompanying the aerodynamic breakup of water drops, first studied systematically by the German physicist P. Lenard. Also called spray electrification, waterfall effect. Compare Macky effect. </dd>
Experiments have shown that the degree of charge separation in spray processes depends upon the drop temperature, presence of dissolved impurities, speed of the impinging airblast, and contact with foreign surfaces. The largest fragments of the broken drops are observed to carry positive charges and the fine spray of drops carried off in the impinging air current carries a net negative charge. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use