Journal
JOURNAL OF FLUIDS AND STRUCTURES
Volume 53, Issue -, Pages 2-14Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jfluidstructs.2014.03.010
Keywords
Wakes; Flow stability; Vortex street; Transition
Categories
Funding
- Australian Research Council [DP0877327, DP110102141, DP110100434, DP130100822]
- Victorian Life Sciences Computation Initiative (VLSCI), iVEC@Murdoch
- Monash Campus Cluster
- Australian Research Council [DP0877327] Funding Source: Australian Research Council
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Recent work on the flow past a rotating cylinder is reviewed and further investigated at low Reynolds numbers. The various two- and three-dimensional transitions that occur as the rotation rate is increased are detailed. Two steady states, steady state I and steady state II, are identified based on the physical characteristics of the wake and the drag force on the body. Steady state I occurs at lower rotation rates, while state steady state II occurs at higher rotation rates. Linear stabiliiy analysis shows that two three-dimensional modes become unstable on steady state I and steady state II. Floquet stability analysis of the unsteady base flows that occur at very low rotation rates shows the presence of five three-dimensional modes. The curves of marginal stability are presented, followed by a comparison of numerical simulations to their experimentally obtained counterparts. Furthermore, the spatio-temporal characteristics of each mode and the likely underlying physical mechanisms are briefly discussed. (C) 2014 Elsevier Ltd. All rights reserved.
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