Author(s): Hubert Chanson; Xinqian Leng; Pedro X. Sanchez

Linked Author(s): Hubert Chanson

Keywords: Symmetrical rectangular flume; Open channel hydrodynamics; Physical modelling; Secondary currents; Sidewall streamwise rib

Abstract: While the literature on transverse beams in open channels is broad, there is comparatively less understanding of the hydrodynamics of channels with streamwise ribs. In the current study, an asymmetrical canal with a sidewall longitudinal beam was studied experimentally to gain some fundamental understanding of the implications in terms of turbulence and environmental applications. The sidewall beam induced regular losses along the canal, with a complicated velocity field and secondary currents. The data showed a contrasted longitudinal velocity map, with high and low velocity zones. The lowest velocities were typically recorded underneath the sidewall beam. Complicated secondary currents of Prandtl’s second kind developed in the inner and outer corners of the beams, as well as in the square cavity underneath.

DOI: https://doi.org/10.1080/00221686.2020.1714761

Year: 2021