Numerical Simulation of Laminar Vortex-shedding Flow Around a very Slender and Rectangular Bluff Body

Abstract

—In the present study, the numerical results of flow and heat transfer structure around a very slender bluff body with a rectangular cross-sectional area are investigated in detail. The Reynolds number is considered so low that the flow presumably is laminar. Reynolds number, Prandtl number, aspect ratio, and the angle of incidence are assumed to be 100, 0.71, 0.1, and 45 degrees respectively. A finite volume method using the SIMPLEC algorithm and non-staggered grid is employed for the simulation in the two-dimensional and incompressible flow regime. The studies of spatial resolution and grid independency are carried out as well. Furthermore, the instantaneous variations of flow parameters are provided and discussed thoroughly. The global quantities including pressure and viscous drag and lift coefficients, the Root Mean Square (RMS) of drag and lift, and Strouhal number are also computed. The simulations reveal that the angle of incidence of the bluff body relocates the stagnation point from the centre to a point at the one-fifth of the frontal side. An acceptable verification has been observed by making a comparison between the provided results and available data in the literature.