Author(s): Robles Isidro; Palacio Arturo
Linked Author(s):
Keywords: Turbulence; Shallow flows; Jets; Video techniques
Abstract: Based on video techniques that allow to obtain spatial and temporal flow information, the effects of bed friction in shallow turbulent flows are here studied, employing a video imaging method. These types of flows are those which apply where the depth of fluid is small compared with the horizontal length scale of the flow. Shallow shear flow of small depth is affected by friction and also by the fact that the large scale turbulence is confined to essentially two dimensional motion. This large scale turbulence is responsible of important heat and mass exchange processes in large water bodies like rivers, lakes and oceans. It was found in this work that only the turbulent flows in the far field are dependent of friction effects, where the distance from injection point of the jets lies within approximately xf > (0. 5) (2l/Cf).
Year: 2007