PARAMETERS INFLUENCING THE CHARGE-TO-MASS RATIO OF ELECTRICALLY SPRAYED LIQUID PARTICLES,
ILLINOIS UNIV URBANA CHARGED PARTICLE RESEARCH LAB
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The problem in the study was to investigate the parameters influencing and the mechanisms involved in the electrical atomization process, i.e., in the process by which liquid surfaces are broken up into small, charged particles as the result of electrostatic forces. Electrical atomization was studied primarily by measuring the charges, masses, velocities, and charge-to-mass ratios specific charge of the particles in the beams thus generated. A theoretical study of the electrical dispersion process is presented. The study includes 1 Surface energy minimization of the dispersed system of particles, 2 Solution of Poissons equation and the influence of space charge on the specific charge of the emitted particles, and 3 the influence of the conductivity and temperature of the liquid on the generation of charged particles. It is proposed that an equilibrium is established among the voltage drop across the liquid meniscus at the capillary tip, the space charge in the vicinity of the source, and the surface energy minimization process -- and that the specific charge of emitted drops is established as a result of this equilibrium.