Shear Stress Distribution in a Sharp 90 Degree Bend with a W-Weir

摘要

In the present paper, by measuring three components of flow velocities with and without presence of W-weir, variation of flow patterns and shear stress distribution in a 90 degree sharp bend have been investigated. The analyses of data show more uniform flow upstream of the weir The shear stress distribution upstream of the weir is more uniform compared to the case of no weir. The results show that shear stress in outer bank is reduced and in inner bank is increased. The results show that for the case of no weir, the shear stress for Froude number of 0.17 and 0.40 in 30-degree location are 1.19 and 5.47, respectively. For the case in which a Weir exists, these values are reduced to 1.16 and 4.07, respectively.