Abstract
The purpose of this study is to show the effect of some physical parameters on a parallel shear flow. The variation of the velocity inlet and the influence of an obstacle placed at the bottom of a channel were analyzed. The governing equations based on K –e model in a line source downstream around a three-dimensional obstacle are determined by the finite volume method with SIMPLEC algorithm. The obtained results have allowed to establish the dynamic characteristics of this kind of flow. Horizontal and vertical velocity fields, Reynolds shear stress field, turbulence intensity and scalar concentration in the water channel and a wind tunnel were exposed. These results permit us to localize the maximum and minimum zones of turbulence, which help us to exploit those fields for different purposes such as energy extraction and port infrastructure.
Highlights
Shear flow is developed in most of the flows that govern our environment such as rivers, oceans or atmosphere
Our goal is to study the dynamic behavior of a shear flow around an obstacle placed at the bottom of a water channel and an air tunnel
We presented first the fields of horizontal and vertical mean velocity; afterwards, horizontal and vertical turbulence intensity; the Reynolds shear stress and the mean scalar concentration
Summary
Shear flow is developed in most of the flows that govern our environment such as rivers, oceans or atmosphere. It reveals a large number of industrial flows (aeronautical, energy, water) as an important parameter. Environmental and hydrodynamic assessment of the coastal fringe area degraded by rivers estuaries, pollution dispersion [1] as well as the wide use of obstacles in industrial and energy applications lead us to study the hydrodynamic phenomena that are formed when a shear flow encounters a fixed obstacle at the bottom of the water channel or a wind tunnel. This factor is the parameter that shows the length of the recirculation zone after the barrier where there is a large area of separation with the flow directed toward the opposite wall
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