Film condensation from a ternary mixture of vapors upon a vertical surface

Autor: F.E. Sage, Joseph Estrin
Rok vydání: 1976
Předmět:
Zdroj: International Journal of Heat and Mass Transfer. 19:323-333
ISSN: 0017-9310
DOI: 10.1016/0017-9310(76)90036-3
Popis: An analytical study of the condensation of a vapor in the presence of noncondensable gases is presented. The bulk mixture is considered quiescent, and the only flow is that induced by the condensate flowing down the wall and the accompanying free convection effects. A full predictive, constant physical property, boundary-layer condensation model is used to describe the system. In a ternary system fractionation is shown to occur between the two noncondensables as the interface is approached. The fractionation is dependent on the difference between the linearized Schmidt numbers. The gas-vapor boundary layer is shown to be supersaturated in the condensation from a saturated mixture with a Lewis number greater than one. Supersaturation can also be obtained in systems with Lewis numbers less than one but only at larger driving forces as measured by the difference between bulk and wall temperatures.
Databáze: OpenAIRE