||Convective Heat and Mass Transfer from Water Surfaces.
Bear, J. Taylor ;
Che, Charles S. ;
Prasa, Chandrika ;
||Virginia Polytechnic Inst. and State Univ., Blacksburg. Water Resources Research Center.
||VPI-WRRC-Bull-47; OWRR-B-021-VA; 05982,; B-021-VA(3)
( Surface waters ;
Air water interactions) ;
Heat transfer ;
Mass transfer ;
Boundary layer transition ;
Mathematical models ;
Analog simulation ;
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Analog computer-methods were used to study convective heat and mass transfer between horizontal flows of air and surface. Solutions of the laminar boundary layer equations for both the gaseous and liquid phases were developed. Profiles of velocity, temperature, and concentration and their gradients were obtained from these solutions. The experimental verification of these results was carried out in a special air-water facility. Concentration of water vapor in air was obtained through the use of a Mach-Zehnder interferometer and the thermocouple-measured temperatures. A Helium-Neon gas laser was used as a light source for the interferometer. Analytical and experimental results are in good agreement and indicate a marked influence of the interfacial motion on heat and mass transfer rates. In co-current flow the increase in the interfacial velocity increased the heat and mass removal resulting from the finite velocity of the interface itself and the increased velocities in the boundary layer close to the interface. (Author)