Accession Number : AD0288893

Title :   A MATHEMATICAL ANALYSIS OF SOLUTE REDISTRIBUTION DURING EVAPORATION WITH A CARRIER GAS

Corporate Author : WESTINGHOUSE ELECTRIC CORP PITTSBURGH PA

Personal Author(s) : TILLER,W.A.

Report Date : 23 JUL 1962

Pagination or Media Count : 1

Abstract : Control of solute flux entering a carrier gas stream requires a knowledge of the solute distribution in the liquid during the evaporation and the gas-phase boundary layer characteristics at the surface of the liquid. A mathematical analysis is presented of the solute redistribution in a one-dimensional liquid system as a function of position and time during evaporation at a constant rate. Evaporation kinetics are assumed to be sufficiently rapid for equilibrium to prevail at the surface of the liquid and the evaporation flux is assumed to be transport controlled. It is further assumed that the flow of carrier gas is sufficient to produce a solute boundary layer of thickness 2L at the surface. The solute concentration outside this boundary layer is that of the in-coming carrier gas. Cases of (1) purely diffusional transport in the liquid (no mixing) and (2) primarily convective transport in the liquid (partial mixing) are considered. (Author)

Descriptors :   *KINETIC THEORY, *SINGLE CRYSTALS, *VAPOR PLATING, DIFFERENTIAL EQUATIONS, DIFFUSION, EVAPORATION, GAS FLOW, GASES, LIQUIDS, MATHEMATICAL ANALYSIS, SOLUTIONS(MIXTURES), TRANSPORT PROPERTIES, VAPORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE