ABSTRACT
INTRODUCTION Flow around circular cylinders is a classical problem of fluid mechanics due to its common occurrence in many applications. The flow around an isolated cylinder has been extensively studied, (comprehensive reviews in Williamson 1996, Zdravkovich 1997, Zdravkovich 2003) and Sumner (2010) presented a review of studies about the effects of a second cylinder placed in close proximity, arranged in tandem, side-by-side, or in staggered configurations. Less well studied are the changes to the flow when a cylinder is placed in an array of cylinders, specially when they are randomly placed. The flow field of multiple-cylinder configurations involve complex interactions between wakes, von Kármán vortex streets and shear layers (Sumner 2010).
