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Wind waves and diffusion in open channels

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dc.contributor.authorSu, Kuo-Shyong, author
dc.contributor.authorGessler, Johannes, author
dc.contributor.authorFluid Dynamics and Diffusion Laboratory, Colorado State University, publisher
dc.date.accessioned2020-03-31T17:32:26Z
dc.date.available2020-03-31T17:32:26Z
dc.date.issued1972-05
dc.descriptionCER71-72KSS-JG47.
dc.descriptionMay 1972.
dc.descriptionIncludes bibliographical references (pages 106-108).
dc.descriptionPrepared under contract no. At (11-1) - 1813, Atomic Energy Commission, Fallout Studies Branch.
dc.description.abstractThis study describes a theoretical and experimental investigation of the vertical and lateral mixing of tracer fluids in a straight, wide, open channel, with and without wind action on the water surface. Using appropriate assumptions and simplifications, a three-dimensional vertical-and lateral-mixing equation suitable for any channel geometry and source distribution is first derived. The experiments were conducted in a two-ft wide wind-water tunnel with and without wind effects. Velocity fields were measured in detail in both cases. Evaluated vertical diffusion coefficients from the measured velocity profiles served as a first approximation to the numerical analysis of the diffusion equation. A specially designed single-electrode conductivity probe-and hot-film sensor was used to measure point velocity and concentration fluctuations from which the covariances of the concentration and longitudinal component of velocity were calculated to evaluate the longitudinal diffusion coefficients. Wave data were recorded and analyzed to relate the water surface properties with the diffusion process. Concentration profiles of the tracer were obtained in cross-sections at various distances downstream from the source. The data were used to evaluate the vertical and lateral mixing coefficients by a simulation method. The results indicated that the vertical mixing rates were significantly increased when waves appear on the water surface, the rate of lateral mixing was slightly decreased and the tracer plume was found to deflect downward in the mixing process although the tracer was neutrally buoyant.
dc.format.mediumtechnical reports
dc.identifier.urihttps://hdl.handle.net/10217/201668
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relationCatalog record number (MMS ID): 991013228219703361
dc.relationTA7 .C6 CER 71/72-47
dc.relation.ispartofCivil Engineering Reports
dc.relation.ispartofCER, 71/72-47
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectWind waves
dc.subjectFluid dynamics -- Mathematical models
dc.subjectChannels (Hydraulic engineering)
dc.titleWind waves and diffusion in open channels
dc.typeText
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