The situation where a turbulent jet enters a shallow body of water where there are two adjacent boundaries (e. g. channel bed and the free surface) is studied. Research has shown that the specific boundary of attachment depends principally on the depth of the tailwater and the Froude Number of the jet. The work has also shown that for certain conditions it is posssible to flick the jet from one boundary to the other, thereby completely changing the flow pattern within the tailwater. Velocity measurements were made using a hot-film anemometer system which also enabled the turbulence characteristics of the flows to be investigated. The paper presents some results of the study, concentrating attention on the shear stress distribution close to the channel bed and demonstrating the great changes which occur when the jet attaches itself to the free-surface rather than the channel bed.
|Title of host publication||National Conference Publication - Institution of Engineers, Australia|
|Number of pages||5|
|Publication status||Published - 1984|