Three-dimensional simulations of the complex dielectric properties of random composites by finite element method
The complex dielectric properties of binary-phase composites was simulated with a three dimensional structure consisting of cubic grains, using a Monte Carlo finite element method. The permittivity and ohmic conductivity of the two phases were assumed to be frequency independent. Numerical results were fitted using Maxwell-Garnett Bruggeman symmetrical, and general effective media formulas. The results show that in the low-frequency region, potential contours tend to avoid passing through one phase in the composite, whereas in the high-frequency region, the period of time is too short for charge accumulation near the interphase boundaries.
Zhao, X; Wu, Y; Fan, Z; Li, F
Journal of Applied Physics
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