Mass transfer from aerodynamically rough surfaces

Abstract

Mass transfer rates were determined by directly measuring the actual volume of water evaporated from saturated wavy (sinusoidal) surfaces in a micrometeorological wind tunnel. Simultaneous measurements of mean velocity, humidity and temperature distributions were made over these saturated waves. Under equilibrium boundary layer conditions, the average mass transfer coefficient was found to be a simple power function of the surface Reynolds number, u*z0/v Based on this result the mass transfer data from this study correlated well with published mass transfer data from various other types of surfaces, e.g. water waves, flat plate, and surfaces roughened with pyramids and spanwise humps. © 1974.