Abstract
Experimental investigations and numerical analysis were carried out to clarify the behavior of an interactive flow around two circular cylinders with different diameters. In particular, the reattachment that the separated shear layer from the main cylinder reattaches on the rear surface by Coanda effect was noted. The results obtained were as follows. Intermittency of the reattachment was found in the present numerical calculation, and was confirmed experimentally. The calculated values of time-averaged fluid forces agreed well with those of experiments, and the qualitative characteristics of calculated Strouhal numbers were coincident with those of experiment.
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