Author(s): D. A. Miranda; A. M. Reis; E. Alves; A. H. Cardoso; M. M. L. P. Coelho

Linked Author(s): António Heleno Cardoso, Daniel Augusto de Miranda

Keywords: Shallow reservoirs; Sedimentation; Flow pattern; Physical modeling; Geometric configurations; Hydrodynamic behavior

Abstract: This article presents an analysis of the influence of symmetrical and asymmetrical positioning of the inlet and outlet channelsonflowpatterninsidearectangularshallowreservoir, bymeansofaseriesofexperimentswithclearwaterinthe laboratory. The experimental facility was built in the Hydraulic Research Center (CPH) of the Federal University of Minas Gerais (UFMG), which consisted of a 3 m long and 2 m wide rectangular basin, whose maximum depth was 0.30 m. The inlet and outlet channels were 1.0 m long, 0.125 m wide, and 0.30 m deep. Three different positions were provided for the installation of inlet and outlet channels in their respective transverse walls: left, center, and right. Six different geometric combinations of the inlet and outlet channels were experimentally tested, each under three different flow rates: 0.50,1. 25, and 3.40 l/s. Considering the results related to the unique axis-symmetric configuration, the main jet crossed the basin from upstream to downstream, developing a meander-likepathforthelowerflowdischarge. Moreover, theformationoftwolargeeddiesinoppositedirectionshasbeen noticed, one on each side of the main jet. For the higher flow rates, however, the flow pattern was asymmetrical with the main jet diverting to the right and forming a large counter clockwise vortex. For all the asymmetrical configurations, the flow pattern was also asymmetrical, regardless of the flow rate.

DOI: https://doi.org/10.15142/T38063

Year: 2018