Dynamic properties of foam structure electrical conductivity distribution along height

Abstract

Experimentally obtained temporal characteristics of electrical conductivity (resistance) distributed on the height of the foam layer are presented. The construction of an electrical conductivity measuring complex based on the principle of volt-ampere method and sequentially interrogating many measuring conductivity sensors distributed along the height of the sample are considered. The result in the form of a graph is displayed in the indicator screen faster than the foam structure disintegrates. The proposed complex performs 4 measurement cycles in less than 5 seconds, which is sufficient to measure foam structure changes. The formation of gradient high-resistivity layers in the upper part of the sample is detected, that is the reason for the increased emissivity of foam formations detected during remote sensing of the sea surface. The resistance between probes in the surface layer reaches levels exceeding 8 megohms.