The determination of mass transfer rates from individual small bubbles
β Scribed by F. Bischof; M. Sommerfeld; F. Durst
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 791 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0009-2509
No coin nor oath required. For personal study only.
β¦ Synopsis
The time-dependent mass transfer rates from individual air bubbles into water of differing quality was measured with high accuracy by a gas chromatograph.
The bubbles were released at the bottom of a plexiglass column which was filled with either distilled, tap, or sewage water. They were collected at
π SIMILAR VOLUMES
Experiments with 1 wt% aqueous CMC in a 14 cm diameter bubble column revealed biiodal bubble size distributions: large bubbles which conveyed most of the gas in plug flow and small bubbles. Dynamic and steady state oxygen transfer experiments showed that the small bubbles (i) contributed 20 to 50% o
The influence of surface active agents on the rate of dissolution of spherical cap bubbles at Re > 100 is modeled by assuming that the surfactant forms a stagnant film on the spherical surface near the rim of the bubble. The extent of this stagnant zone is dictated by a balance between surface force
The mass transfer from a gas bubble in water is calculated for the important case where this mass transfer is decreased by the presence of surfactant in the liquid phase. In the calculation it is assumed that a stationary situation has been established as regards the exchange of surfactant between i