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Title:Some data on diffusion and turbulence in relation to reaeration
Author(s):Holley, E.R.
Contributor(s):Keramati, A.; University of Illinois at Urbana-Champaign
Subject(s):Water resource development--Illinois
Water resources development
Waste water
Dissolved oxygen
Geographic Coverage:Illinois (state)
Abstract:Heat was used as a tracer to determine diffusion rates immediately below the free surface both in the "film" region and in the remainder of the water in a mixing vessel. The results tend to indicate that a diffusion model can be used to represent the downward transport of a substance which is being absorbed at the free surface. Apparently, the diffusion coefficient in the "film" can be either equal to or greater than the molecular coefficient depending on the amount of mixing at the free surface. Hot film anemometry was used to determine turbulence characteristics from 1 in. to 0.006 in. below the free surface of a laboratory open channel flow. The energy spectra indicate no significant changes in the turbulence in this region. Thus, apparently turbulence exists right up to the free surface and in the "film" region. The amount of reliable data that was obtained was very limited.
Issue Date:1969-07
Publisher:University of Illinois at Urbana-Champaign. Water Resources Center
Sponsor:U.S. Department of the Interior
U.S. Geological Survey
Rights Information:Copyright 1969 held by E.R. Holley
Date Available in IDEALS:2016-06-20

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