Author(s): Javier Arce; Francisco Martinez; Juan P. Toro
Linked Author(s): Francisco Javier Sánchez Martínez, Francisco Martinez Carreaux
Keywords: Subcritical flows; Turbulent flows; Reynolds stresses; Velocity distribution; Macro-obstacle
Abstract: Macroroughness flow dynamics is a topic of interest in fluvial and urban hydraulics. In this context, a turbulent flow interacts with irregularities of very large sizes, such as rocks, trunks, bedforms, and civil structures, resulting in a scenario that affects sediment transport processes, energy dissipation, velocity distribution, and turbulent intensity (Bathurst, 1985; Hey, 1979). A better understanding of these elements would allow us to optimize the design of hydraulic infrastructure and improve flood management around the world. In this context, the present study analyzes how the velocity distributions and turbulent Reynolds stresses are affected at various positions around a large, isolated cube immersed in a steady, turbulent, and subcritical flow under variable initial conditions. We analyze the influence of the aspect ratio λ= h0/W on this interaction, where h0 is the approximation flow depth and W the side of the cube, extending some previous studies (e.g. Martinuzzi and Tropea, 1993; Singh et al, 2018).
Year: 2025