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Updated: Jul 27, 2026

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
Published on: August 27, 2013
Noisy inflows cause a shedding-mode switching in flow past an oscillating cylinder
Didier Lucor1, George Em Karniadakis
1Division of Applied Mathematics, Brown University, Providence, Rhode Island 02912, USA. didi@dam.brown.edu
Abstract:
Vortex streets formed behind oscillating bluff bodies consist of arrays of groups of two, three, or four vortices classified as 2S, P+S, and 2P shedding modes, respectively. The prevailing dominant mode depends primarily on the amplitude and the frequency of the oscillation and on the Reynolds number. We investigate the effect of noise at the inflow on the stability of these vortex modes in laminar flow past a circular cylinder. We employ stochastic simulations based on a new polynomial chaos method to study the shedding-mode switching from a P+S pattern to a 2S mode in the presence of noise.
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