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Nonlinear synchronization in open flows

Abstract : The selection criteria governing finite-amplitude synchronized oscillating states are discussed for model systems and real wake flows in a domain of infinite streamwise extent. Two types of nonlinear global modes are possible: hat modes with overall smoothly varying amplitude and elephant modes with a sharp front. The vortex street in wake flows is of elephant type, as observed in direct numerical simulations of a real spatially developing wake. Furthermore, the elephant frequency selection criterion is in excellent agreement with the numerically determined vortex shedding frequency.
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https://hal.archives-ouvertes.fr/hal-00119923
Contributor : Benoît Pier <>
Submitted on : Wednesday, December 13, 2006 - 7:30:21 AM
Last modification on : Monday, October 26, 2020 - 2:50:03 PM
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Benoît Pier, Patrick Huerre. Nonlinear synchronization in open flows. Journal of Fluids and Structures, Elsevier, 2001, 15, pp.471-480. ⟨10.1006/jfls.2000.0349⟩. ⟨hal-00119923⟩

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