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The transition of flow from laminar to turbulent has been a topic of considerable interest for fluid dynamicists. Evolution of spanwise three-dimensionalities in the wake of an elongated bluff body occurs before the wake becomes turbulent. Several engineering structures such as industrial chimneys, marine risers, and off-shore structures have tapered geometry. In this study, we show the three-dimensional (spanwise) modes in the wake of a rotationally oscillating tapered cylinder.
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Bhattacharyya et al. (2023) studied this question.
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