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- W2005144751 abstract "We study the electrical conductivity $ensuremath{sigma}$ of a dispersion of randomly oriented and positioned particle inclusions having common shape and conductivity ${ensuremath{sigma}}_{p}$, suspended in an isotropic homogeneous matrix of conductivity ${ensuremath{sigma}}_{0}$. For this problem, the mixture conductivity is a scalar and we concentrate on the leading order concentration virial coefficient, the intrinsic conductivity [$ensuremath{sigma}$]. Results for [$ensuremath{sigma}$] are summarized for limiting cases where there is a large mismatch between the conductivities of the inclusions and the suspending matrix. For a general particle shape, we then treat the more difficult case of arbitrary relative conductivity $ensuremath{Delta}ensuremath{equiv}frac{{ensuremath{sigma}}_{p}}{{ensuremath{sigma}}_{0}}$ through the introduction of a Pad'e approximant that incorporates (exact or numerical) information for [$ensuremath{sigma}(ensuremath{Delta})$] in the $ensuremath{Delta}ensuremath{rightarrow}ensuremath{infty}$, $ensuremath{Delta}ensuremath{rightarrow}{0}^{+}$, and $ensuremath{Delta}ensuremath{approx}1$ limits. Comparison of this approximation for [$ensuremath{sigma}(ensuremath{Delta})$] to exact and finite element calculations for a variety of particle shapes in two and three dimensions shows excellent agreement over the entire range of $ensuremath{Delta}$. This relation should be useful for inferring particle shape and property information from conductivity measurements on dilute particle dispersions. The leading order concentration virial coefficient for other mixture properties (thermal conductivity, dielectric constant, refractive index, shear modulus, bulk modulus, viscosity, etc.) are equally well described by a similar Pad'e approximant." @default.
- W2005144751 created "2016-06-24" @default.
- W2005144751 creator A5044313983 @default.
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- W2005144751 date "1996-06-01" @default.
- W2005144751 modified "2023-09-25" @default.
- W2005144751 title "Intrinsic conductivity of objects having arbitrary shape and conductivity" @default.
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- W2005144751 doi "https://doi.org/10.1103/physreve.53.6169" @default.
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