Laboratory flume experiments on water-wide controlled gas transfer, such as reaeration, are described. The experiments indicate that gas transfer is a surface renewal process, well described by P. V. Dankwerts' model, as originally proposed by D. J. O'Connor and W. E. Dobbins. The primary cause of surface renewal in flumes is proposed to be the upwelling of secondary currents and is documented by relating measurements of these currents to gas transfer measurements. A dimensionless liquid film coefficient is related to a shear Peclet number and a shear Reynolds number. The shear Reynolds number represents the effectiveness of secondary currents in penetrating the water surface.
|Original language||English (US)|
|Title of host publication||Unknown Host Publication Title|
|Number of pages||8|
|State||Published - Jan 1 1986|