Flow Around a Sharp-Edged Surface-Mounted Cube by Large Eddy Simulation

FILIPPINI, GERMÁN; FRANCK, GERARDO; NIGRO, NORBERTO; STORTI, MARIO; D'ELÍA, JORGE

Buenos Aires

Congreso; MECOM 2005 (VIII Congreso Argentino de Mecánica Computacional).; 2005

Facultad de Ingeniería y Ciencias Exactas y Centro de Estudios Avanzados de la UADE

Large Eddy Simulations (LES) of the three-dimensional flow around fixed bluff bodies have been performed in two benchmarks: a square cylinder (case A) and a wall-mounted cube (case B), as denoted by Rodi et al. (ASME transaction, vol. 119, pp. 248-262, June 1997). Due to some differences in the flow modeling, in this communication case A is considered while in a companion work the results for the other case are shown. In case A, the flow around a square cylinder, experiments show a typical unsteady-flow regime with a periodic wake (the von Kármán vortex street) although there is some modulation on the periodicity. The selected flow conditions for the present numerical simulations are taken from those suggested by Rodi et al. Time-averaged and instantaneous flow visualizations are used to clarify the flow behavior and are then contrasted to the experiment ones.