Transition to Periodic Behaviour of Flow Past a Circular Cylinder under the Action of Fluidic Actuation in the Transitional Regime

Wasim Sarwar, Fernando Mellibovsky, Md. Mahbub Alam and Farhan Zafar
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Wasim Sarwar: Department of Physics, Aerospace Engineering Division, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain
Fernando Mellibovsky: Department of Physics, Aerospace Engineering Division, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain
Md. Mahbub Alam: Institute for Turbulence Control, Harbin Institute of Technology, Shenzhen 518055, China
Farhan Zafar: Institute for Turbulence Control, Harbin Institute of Technology, Shenzhen 518055, China

Energies, 2021, vol. 14, issue 16, 1-10

Abstract: This study focuses on the numerical investigation of the underlying mechanism of transition from chaotic to periodic dynamics of circular cylinder wake under the action of time-dependent fluidic actuation at the Reynolds number = 2000. The forcing is realized by blowing and suction from the slits located at ± 90 ∘ on the top and bottom surfaces of the cylinder. The inverse period-doubling cascade is the underlying physical mechanism underpinning the wake transition from mild chaos to perfectly periodic dynamics in the spanwise-independent, time-dependent forcing at twice the natural vortex-shedding frequency.

Keywords: transitional flow; period doubling bifurcation; dynamical systems (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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