Explosive vaporization of small droplets by a highhyphen;energy laser beam

摘要

We have constructed a model of the explosive vaporization of small droplets caused by the absorption of energy from a highhyphen;energy laser beam. The model consists of polarizable fluid streaming from the exploded droplet and interacting with laser radiation. A novel criterion for the explosive vaporization in the droplet is introduced, in which the absorbed energy density has to be greater than the restrictive pressure due to surface tension. Selfhyphen;similarity is invoked to reduce the spherically symmetric problem involving hydrodynamics and Maxwellrsquo;s equations to simple quadrature. We have compared our model with experiments. An analytic solution has been obtained in a limiting case.