Unsteady flow around two square cylinders in staggered arrangements

Abstract

Paper presented at the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Turkey, 19-21 July, 2010.In this study, the flow around two staggered square cylinders, placed in a uniform flow field, has been studied. The numerical simulations have been performed by use of a commercial CFD software Fluent. The Reynolds number, defined as a function of cylinder width D, has been chosen as 100 and 200. In the simulations, the dimensionless distance P/D, between the cylinder centers was changed from 2 to 5, and the incidence angle 8 also has been changed from 0' to 90' by 25' increments. In order to evaluate the flow field, isovorticity curves were obtained at different values of dimensionless distance P/D and incidence angle 8. The deviation of the mean drag coefficients and of the square root values of the lift coefficient with P/D and 8 also determined. The power spectrums of the lift coefficient have been obtained for different flow fields.