Multiple Scattering of Waves in Discrete Random Media

摘要

Multiple scattering of waves in discrete random media was investigated particularly in the scattered intensities (coherent and incoherent). The formalism was applied to examine the effective properties, which are frequency dependent, of either structural composites or wave absorbing composite materials (electronic, elastic and acoustic). The pair correlation function for hard disks was obtained using Monte Carlo simulation and later was used to compute the effective propagation constants for fiber reinforced composites. Nonspherical statistics was employed to study scattering from densely distributed nonspherical scatterers in host medium. The coherent as well as incoherent intensities were computed for spheroidal scatterers and spherical scatterers with different polarizations. The backscattered intensities obtained from our formalism which parallels the diagram method first proposed by Feynman compare favorably with those from optical experiments.