Transition of flows past a pair of side-by-side circular
cylinders are investigated by numerical simulations and the bifurcation
analysis of the numerical results. Various flow patterns behind the
cylinder-pair have been identified by the gap ratio (G) and Reynolds number (Re).
This study focus on transition of in-phase and anti-phase vortex shedding
synchronized forms. A nested Cartesian-grid formulation, in combination with an
effective immersed boundary method and a two-step fractional-step procedure,
has been adopted to simulate the flows. Numerical results reveal that the
in-phase and anti-phase vortex shedding flows at Re=100 can
co-exist at 2.08 ≤G≤ 2.58. Hysteresis loop with increasing/decreasing G at constant Reynolds number Re=100 is reported.
Cite this paper
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