Abstract
This paper performs the effect of solid volume fractions (0.09< SVF<0.64) on the flow through and around a square cylinder array at Re=63832. A delayed vortex shedding occurs in 8x8 array (SVF) while the Strhoul number is slightly higher than the solid one. For the intermediate SVF (0.25<SVF<0.49), the separated shear layers (SSLs) contain large-scale turbulent eddies but their ends cannot interact to generate wake billows. The maximum of root mean square of transverse velocity along wake center-line decreases monotonously as SVF decreases, and several ways of defining the spatial extent of the wake region are discussed.
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