Investigation of the formation process of soap bubbles from soap film

TL;DR

This study investigates how soap bubbles form from soap films, revealing a constant size ratio and linear formation position increase, explained by Rayleigh-Plateau instability theory, with experimental data supporting the findings.

Contribution

It introduces a quantitative analysis of bubble formation dynamics from soap films, linking experimental observations with theoretical Rayleigh-Plateau instability explanations.

Findings

Bubble size to soap film column ratio is constant

Formation position increases linearly within a critical length-range

Rayleigh-Plateau instability explains the formation process

Abstract

In this paper, we study the formation process of a soap bubble by blowing soap film. Both bubble diameter and formation position were investigated in experiments. We found that the ratio between bubble size and soap film column is constant, and that the formation position increases linearly within a critical length-range. We used the theory of Rayleigh-Plateau instability to explain these findings. The theoretical explanations are consistent with the experimental data.