Diluted-dispersed mass transfer within an AWE

TL;DR

This paper models the multiphase mass transfer processes in an alkaline water electrolyzer, focusing on bubble dynamics and boundary layer analysis using mathematical and dimensionless formulations.

Contribution

It introduces a detailed mathematical framework for dilute-dispersed mass transfer in water electrolyzers, including governing equations, two-fluid models, and boundary layer analysis.

Findings

Development of governing and dimensionless equations

Application of boundary layer and self-similarity analysis

Framework for modeling bubble dynamics in electrolyzers

Abstract

The goal of this document is describe the multiphase transfer processes describing the bubble dynamics of a water electrolyzer. The motivation is to describe the dilute-dispersed mass transfer within and Alkaline Water Electrolyzer. Special emphasis is put on the mathematical formulation. The presentation starts by posing the governing equations and their dimensionless counterpart. By filtering the equations, the two-fluid model is presented along with the need to sub-scale and wall models. To the later aim, boundary layer equations are introduced. By reviewing self-similiarity transformations, the analysis of Blasius, Ostrach and Sparrow is reviewed for Prandtl's boundary layer equations; along with that of Leveque.