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Seventh International Symposium on Turbulence and Shear Flow Phenomena
July, 28-31, 2011, Ottawa Convention Centre, Ottawa, Canada

DOI: 10.1615/TSFP7

DIRECT NUMERICAL SIMULATION OF TURBULENT FLOW PAST HEXAGONAL CYLINDERS

pages 1-4
DOI: 10.1615/TSFP7.1060
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RESUMO

The unsteady wake behind a hexagonal cylinder in cross-flow is investigated numerically. The time-dependent three-dimensional Navier-Stokes equations are solved for moderately high Reynolds numbers Re and for two different cylinder orientations. The topology of the vortex shedding depends on the orientation and the Strouhal frequency is generally higher in the wake of a face-oriented cylinder than behind a corner-oriented cylinder. This behaviour is contradictory to earlier findings for square cylinder wakes.

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