Flow Structures Identification through Proper Orthogonal Decomposition: The Flow around Two Distinct Cylinders

Numerical simulations of fluid flows can produce a huge amount data and inadvertently important flow structures be ignored, if thorough analysis is not performed. The identification these structures, mainly in transient situations, complex task, since such change time move along the domain. With decomposition entire set into smaller sets, present main with periodic behaviour, like vortices, identified. Therefore, through frequency each components using number components, we show that Proper Orthogonal Decomposition used only to reduce significant data, but also obtain better global understanding (through specific modes). In this work, von Kármán vortex street decomposed generator base analysed for 2D around cylinder two cylinders different radii. We consider Newtonian non-Newtonian power-law fluids, n=0.7 n=1.3. Grouping modes, reconstruction made, allowing otherwise would impossible identify simple post-processing flow.