A study of three-dimensional interaction between a rod-like body, such as a thin blade or circular cylinder, and an initially columnar vortex was performed using flow visualization experiments and computational solution of idealized flow models. The study focuses on the vortex response to the body, vortex-induced separation of the body boundary layer and interaction between the vortex and the separated boundary layer vorticity. Three distinct regimes of vortex-body interaction are identified, and the main flow physics in two of these regimes is discussed. Experimental results for these regimes are compared with computations and results of an analytical model.
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