| Abstract
| - In this paper, the kinetics of CO2 bubble nucleation from tiny gas pockets trapped inside cellulose fibersimmersed in a glass of champagne were investigated, in situ, from high-speed video recordings. Taking intoaccount the diffusion of CO2-dissolved molecules from the liquid bulk to the gas pocket, a model was derivedwhich enabled us to connect the kinetics of bubble nucleation with both fiber and liquid parameters. Convectionwas found to play a major role in this process. The boundary layer around the gas pocket where a gradientof CO2-dissolved molecules exists was also indirectly approached and found to be in the order of 10−20 μm.Because most of the particles adsorbed on the wall of a container or vessel free from any particular treatmentare also believed to be cellulose fibers coming from the surrounding air, the results of this paper could beindeed extended to the more general field of nonclassical heterogeneous bubble nucleation from supersaturatedliquids.
|
