Electrical conductivity of dispersions: from dry foams to dilute suspensions

Details Electrical conductivity of dispersions: from dry foams to dilute suspensions Electrical conductivity of dispersions: from dry foams to dilute suspensions

2005-07-18

arxiv.org/abs/cond-mat/0507381v1

J. Phys.: Condens. Matter 17, 6301-5 (2005)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1088/0953-8984/17/41/001

We present new data for the electrical conductivity of foams in which the liquid fraction ranges from two to eighty percent. We compare with a comprehensive collection of prior data, and we model all results with simple empirical formul\ae. We achieve a unified description that applies equally to dry foams and emulsions, where the droplets are highly compressed, as well as to dilute suspensions of spherical particles, where the particle separation is large. In the former limit, Lemlich's result is recovered; in the latter limit, Maxwell's result is recovered.

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