A review of bubble break-up.

Area of Science:

• Fluid dynamics
• Chemical engineering
• Physical chemistry

Background:

• Bubble coalescence and break-up are critical in industrial processes.
• Existing research predominantly focuses on bubble coalescence, neglecting bubble break-up.
• Bubble break-up requires further in-depth investigation.

Purpose of the Study:

• To provide a comprehensive review of bubble break-up mechanisms.
• To summarize bubble deformation processes leading to break-up.
• To highlight the influence of various factors and experimental techniques on bubble break-up.

Main Methods:

• Review of existing literature on bubble dynamics.
• Analysis of bubble break-up under different turbulence conditions (high and low).
• Examination of bubble deformation and break-up mechanisms.

Main Results:

• Identified key bubble break-up mechanisms: shearing-off, coalescence-induced pitching, and impact pinching.
• Reviewed the impact of turbulence, shear forces, bubble size, interfacial stability, and surfactants on break-up.
• Summarized recent experimental techniques for studying bubble break-up.

Conclusions:

• Bubble break-up is a complex phenomenon influenced by multiple factors.
• Further research into bubble break-up dynamics is essential for industrial applications.
• Microfluidics offers a promising platform for studying bubble break-up processes.