GAS TRANSFER AND SECONDARY CURRENTS IN OPEN CHANNELS.

John S. Gulliver, Martin J. Halverson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

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 languageEnglish (US)
Title of host publicationUnknown Host Publication Title
PublisherASCE
Pages1057-1064
Number of pages8
ISBN (Print)0872625451
StatePublished - Jan 1 1986

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