The Evolution of a Gas Bubble in a Closed Volume of Stirred Liquid,
Abstract
The rate of bubble evolution and hence the rate of mass transport across a curved liquid-gas interface has been examined both theoretically and experimentally. The closed liquid volume constraint provides the mechanism by which the gas bubble may be placed initially in a state of stable equilibrium, thus allowing an accurate determination of the system parameters. The stirred liquid condition is measured with the use of laser-doppler anemometry. Through an experimental examination on the complete dissolution of nitrogen gas bubbles in water, the mechanism of mass transport is shown to be consistent with a model comprised of two processes: (1) the primary and rate-limiting process is modelled by the diffusion of gas through an unstirred liquid boundary layer whose thickness varies with bubble radius, and (2) a second-order limitation is shown to be due to the condition of non-equilibrium of the gas component at the phase boundary. The non-linearity of mass transport is shown to increase as curvature of the liquid-gas interface increases. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1983
- Accession Number
- ADP001020
Entities
People
- Charles A. Ward
- Peter Tikuisis
Organizations
- University of Toronto