# Electrical conductivity of quasi-two-dimensional foams

## TL;DR

This study investigates the electrical conductivity of quasi-2D foams, proposing a model that accurately relates their structural and conductive properties across various liquid contents, with implications for foam characterization.

## Contribution

The paper introduces a new model for electrical conductivity in quasi-2D foams that accounts for liquid in the nodes, improving understanding of foam properties.

## Key findings

- Model accurately predicts conductivity across liquid contents
- Liquid in nodes significantly affects conductivity even at low liquid levels
- Results enable better in situ foam characterization in microfluidics

## Abstract

Quasi-two-dimensional (quasi-2D) foams consist of monolayers of bubbles squeezed between two narrowly spaced plates. These simplified foams have served successfully in the past to shed light on numerous issues in foam physics. Here we consider the electrical conductivity of such model foams. We compare experiments to a model which we propose, and which successfully relates the structural and the conductive properties of the foam over the full range of the investigated liquid content. We show in particular that in the case of quasi-2D foams the liquid in the nodes needs to be taken into account even at low liquid content. We think that these results may provide different approaches for the characterization of foam properties and for the in situ characterization of the liquid content of foams in confining geometries, such as microfluidics