Effects of aggregation on the permittivity of random media containing monodisperse spheres

摘要: Numerical simulations were used to calculate the effective permittivities of three-dimensional random particle suspensions containing up 2440 particles and exhibiting two types aggregation. The modeled as 200 μm spheres that aggregated into either large spherical clusters or foam-type microstructures with voids. Multiple scattering 0.01–10.0 GHz electromagnetic fields was simulated using a first-principles iterative multipole approach matrix 1.0 8.5, respectively. computational results showed both significant highly trends. Aggregation decreased permittivity by 3.2±0.2%, whereas aggregation increased 3.0±1.6%. trends exhibited little change frequency. These compared medium approximations predicted higher permittivitie...