Abstract
This paper describes an experimental investigation, supported by analysis, of free convection in an air-water vapor boundary layer at the stagnation point of a horizontal cylinder. A two-component boundary layer is created by the effusion of water vapor from the porous surface of the cylinder; the ambient gas is pure air. The results of both experiment and analysis indicate that the heat transfer decreases as the surface mass-transfer rate increases. At moderate blowing rates, there is good agreement between the experimentally- and analytically-determined Nusselt numbers. At higher mass-transfer rates, the data lie above the analytical predictions by about 25 per cent. This departure is attributed to a fluctuating motion in the boundary layer.
Original language | English (US) |
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Pages (from-to) | 53-61 |
Number of pages | 9 |
Journal | International Journal of Heat and Mass Transfer |
Volume | 9 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1966 |