Scientists unlock secret to thick, stable beer foams
15 days ago
- #physics
- #beer
- #foam
- Beer foam longevity is influenced by the degree of fermentation (single, double, or triple).
- Foams are common in everyday products like food, beverages, and insulation materials.
- Foams form when air is beaten into a liquid with surfactants, which stabilize bubble walls.
- Bubbles initially form spheres for energy efficiency but coarsen over time, leading to polyhedral shapes.
- Foam rigidity comes from 'jamming,' where bubbles press together, increasing internal pressure.
- Factors like 'collective bubble collapse' (CBC) can affect foam stability through cascading breakage effects.