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The bubble dynamics show how bottles can be emptied faster


Bottle emptying is a phenomenon that most of us have observed while pouring a drink.

Researchers at the Indian Institute of Technology Roorkee discovered how to empty bottles faster, which has far-reaching implications for many areas outside the beverage industry. Bubbles have been studied extensively for centuries, including early efforts by Leonardo da Vinci, who explored the sinusoidal rise of bubbles in known to have found a pool.

The growth dynamics of bubbles at the bottle mouth depend on the thermophysical properties of the liquid, the bottle geometry and its angle of inclination.

These inextricably intertwined parameters have made bottle emptying dynamics the next frontier for bubble physicists. This week Lokesh Rohilla and Arup Kumar are investigating this bottle emptying phenomenon from the perspective of bubble dynamics on a commercial bottle using high-speed photography.

Image analysis allowed them to conceptualize various parameters such as liquid film thickness, bubble aspect ratio, slew rate, and bottle emptying modes. ”The bubble dynamics inside the bottle are too complex to examine, so we have broken the bubble interface growth into different stages to understand understand, ”said Rohilla.

It is known that the time to empty a bottle is faster if you increase its angle of inclination.

This increases the so-called bubble squeeze frequency, and the relative increase depends on the thermophysical properties of the liquid. ”Our experiments suggest that there is a critical angle of inclination after which a further increase in the inclination of the bottle does not lead to a further reduction in the emptying time ”Said Rohilla.

This happens due to the saturation of the cavity, i.e.

the space that the air in the liquid environment at the bottle mouth occupies with the angle of inclination.

“Two different types of bottle emptying were identified.

In one mode, the discharge rate is due to a …

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