Calculation of Heating by CW Laser of Metal Nanoparticles Suspended in a Droplet of Liquid Fuel
Technical Report,21 Jun 2019,23 Sep 2019
NAVAL RESEARCH LAB WASHINGTON DC WASHINGTON United States
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We develop formulae to determine the temperature of small particles heated by a continuous wave laser while suspended in a droplet of an electromagnetically absorptive medium e.g. a droplet of fuel. Using these formulae along with the Mie theory of scattering, we calculate thetemperatures that could theoretically be reached by aluminum and aluminum oxide particles suspended in a droplet of JP-10 under a 25 Watt,10.6 m CW laser. Mie theory predicts a significantly higher scattering cross section for aluminum nanoparticles than aluminum oxide, and thus,we find a significantly higher equilibrium temperature. We also find that JP-10 absorption and vaporization play a significant role in the heating process.
- Inorganic Chemistry