This paper is concerned with numerical investigation of vortex shedding and flow interference between two circular cylinders in tandem arrangement. It is known that, when more than one circular cylinder is placed in a fluid flow, the resulting vortex shedding pattern may be completely different from those found on a single cylinder at the same Reynolds number. The simulations are performed for a Reynolds number range varying from low to high Reynolds numbers, and the flow is solved through the Lattice Boltzmann method. Special attention is paid to the effect of the spacing between the cylinders. Streamline patterns and vorticity contours of flow around the circular cylinders and time histories are presented. It may be concluded that the present mesoscopic approach study produces results that are in excellent conformity with earlier conventional numerical observations.

Keywords: Lattice boltzmann method, Circular cylinder, Tandem arrangement, D2Q9 model, Bluff body.