.Thermophoretic experiments in aerosol carried out in microgravity conditions during parabolic flights and in the Bremen drop tower, allowed us to extract useful additional information from the Brownian motion of particles, i.e. estimation of the particles size. We achieved a good agreement between particle radii obtained from SEM measurements, and those calculated from the three-dimensional trajectories provided by the holographic microscope. Following this approach, it is possible to find the particle radius related to each observed trajectory and, as a consequence, to a particular estimation of a required parameter (velocity, external force). Not only does it increases the reliability and accuracy of aerosol experiment results, but it should also make the evaluations easier and less time-consuming.
Use of digital holography for size estimation of aerosol particles from their Brownian motion.
PRODI, Franco;
2004
Abstract
.Thermophoretic experiments in aerosol carried out in microgravity conditions during parabolic flights and in the Bremen drop tower, allowed us to extract useful additional information from the Brownian motion of particles, i.e. estimation of the particles size. We achieved a good agreement between particle radii obtained from SEM measurements, and those calculated from the three-dimensional trajectories provided by the holographic microscope. Following this approach, it is possible to find the particle radius related to each observed trajectory and, as a consequence, to a particular estimation of a required parameter (velocity, external force). Not only does it increases the reliability and accuracy of aerosol experiment results, but it should also make the evaluations easier and less time-consuming.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
