Author(s): Kimberley Kasischke; Mario Oertel

Linked Author(s): Kimberley Kasischke

Keywords: Hydraulic structure; Block ramp; Turbulent processes; CFD simulations

Abstract: This study investigates turbulent processes on block ramps within a basin structure. Computational fluid dynamics (CFD) simulations are performed on a ramp with a slope of 1.91° under various discharge conditions to analyze these processes. The simulation results were utilized to provide a qualitative assessment of the turbulence profiles within the specified geometry. In particular, the flow velocity along the ramp was considered. Correlations between turbulence intensity and turbulent kinetic energy are determined. The macro-roughness of the basins due to the boulders mainly induces turbulence in the system and has a significant influence on the underlying processes. However, the turbulence decreases at higher discharges, as the influence of this roughness is reduced with increasing flow. It was observed that the turbulent kinetic energy and the turbulence intensity increase downstream along the ramp and that altered turbulent processes occur at flow transitions. In addition, the results outlined that the overall turbulent characteristics can be classified and described using numerical simulations.

DOI: https://doi.org/10.64697/978-90-835589-7-4_41WC-P2001-cd

Year: 2025