Self_organization of gas bubbles

TL;DR

This paper investigates how hydrogen bubbles self-organize during aluminum etching in a basic solution, forming stationary structures influenced by the etched area's symmetry, modeled through Bernoulli equation solutions.

Contribution

It introduces a model for bubble self-organization based on pressure differences and symmetry considerations during aluminum etching.

Findings

Bubbles form stationary structures influenced by surface symmetry.

Bubble drift is driven by pressure differences caused by bubble density.

The Bernoulli equation effectively models the self-organization process.

Abstract

Self_organization of hydrogen bubbles is reported under etching of metallic Aluminum in a weakly basic solution. The ascending gas bubbles drift to the areas with higher density of bubbles due to pressure difference. As a result, ascending bubbles form various stationary structures whose symmetry is determined by the symmetry of the etched area. The process is modeled on the basis of numerical solution of Bernoulli equation.