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Article Dans Une Revue Physical Review Fluids Année : 2020

Lifetime of a single bubble on the surface of a water and ethanol bath

Résumé

The lifetime of a single bubble on the surface of an alcohol-water liquid bath is measured at intermediate humidity rates. Thanks to an automatic bubble generation device associated with a lifetime measuring device, we carry out a statistical study of the bubble lifetime, which extends over three decades, from 0.1 to 100 s. Up to alcohol concentrations of 12% (g/g), the average bubble lifetime increases with the alcohol concentration. In addition, normalized lifetime probability density functions are independent of the alcohol concentration and relatively well described by a Weibull distribution with an exponent of 4/3. We compare our experimental data with the predictions of a recent model highlighting the importance of Marangoni stresses induced by water contaminants to the fate of a bubble. In our case, these Marangoni stresses are probably induced by heterogeneities in the alcohol concentration maintained by evaporation.
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Dates et versions

hal-02997051 , version 1 (09-11-2020)

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Elise Lorenceau, Florence Rouyer. Lifetime of a single bubble on the surface of a water and ethanol bath. Physical Review Fluids, 2020, 5 (6), ⟨10.1103/physrevfluids.5.063603⟩. ⟨hal-02997051⟩
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