Two-phase conductivity: The electrical conductance of liquid-fluidized beds of spheres

Abstract Measurements of the electrical conductivity, k , of fluidized beds have been extended to cover the full range of conductivity ratio of the two phases, α, and a wide range of dispersed phase volume fraction, f . The Maxwell relation is shown to hold adequately provided α and f are not both high, when all available theories may greatly underestimate the value of k . The results can be applied to describe thermal conductivity and diffusion in composite systems, provided that convective effects can be neglected.