Author(s): Ana M. Ricardo; Joao Ramos; Gianluca Giampa; Moises Brito; Rui M. L. Ferreira

Linked Author(s): Moisés Brito, Rui M.L. Ferreira

Keywords: Density currents; Drag; Lock-exchange tests; Array of cylinders

Abstract: Density currents are an important class of fluid flows that arise in numerous environmental scenarios in which buoyancy forces, generated by density differences, produce motions with large changes in the flow velocity and areas of intense turbulence. The interaction with bluff bodies increases the drag force acting on the current and provide additional mechanisms for entrainment, mixing, and energy dissipation. The aim of the present work is to investigate, numerically and experimentally, the interaction of a density current with an array of in-line rigid and emergent cylinders. The laboratory experiments were conducted in a horizontal and rectangular cross-section channel at the DEMI laboratory of Faculty of Science and Technology, Universidade Nova de Lisboa, Portugal. The channel is 3.0 m long, 0.175 m wide and 0.4 m deep. The lock exchange technique was used to generate the density currents with a reduced gravity of 0.09 m/

DOI: https://doi.org/10.3850/IAHR-39WC2521711920221565

Year: 2022