Binary mixture film condensation of internal flows
Abstract
Film condensation of binary mixture flows in a vertical channel of variable circular cross-section is studied theoretically to predict effects of the channel geometry, vapor flow velocity, system temperature and type of mixture. The condensation is dominated mainly by the liquid-vapor equilibrium characteristics and the mass transfer process in the vapor flow. Nozzle-type flows yield larger values of local condensation rate, although the channel geometry has not a considerable effect on the overall condensation rate. The flow direction has a considerable influence on the condensation rate. Quasi-developed flows show different features from those of developing flows, implying a substantial effect of the flow in the starting region upon the condensation process. By similarity consideration of the governing equations and the boundary conditions, the nondimensional parameters concerning the mass transfer and the phase equilibrium are obtained to characterize the condensation process.
- Publication:
-
Tokyo University Institute of Space and Aeronautical Science Report
- Pub Date:
- December 1980
- Bibcode:
- 1980TUASR..45..291K
- Keywords:
-
- Binary Fluids;
- Channel Flow;
- Film Condensation;
- Vertical Motion;
- Cross Sections;
- Flow Velocity;
- Fluid Films;
- Laminar Flow;
- Liquid-Vapor Equilibrium;
- Mass Transfer;
- Nozzle Flow;
- Fluid Mechanics and Heat Transfer