Effervescent experiments revealed the fascinating fluid dynamics behind bubbly beverages.
. The surfactant-like molecules help reduce the tensions between the liquid and the gas bubbles, creating the smooth rise to the top.In this new study, a team conducted both numerical and physical experiments on four carbonated drinks to investigate the stability of the bubble chains. Depending on the drink, theare quite different.
They then filled small rectangular plexiglass containers with liquid and pumped in gas to create different kinds of bubble chains. They gradually added surfactants or increased the bubble size. They found that the larger bubbles could become stable even without the surfactants. When they kept a fixed bubble size with only added surfactants, the chains could go from unstable to stable.
The authors found that the stability of the bubbles is actually impacted by the size of the bubbles themselves. The chains with large bubbles have a wake similar to that of bubbles with contaminants, which leads to a smooth rise and stable chains.
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