The effects of perforated cylinders on the vortex shedding on the suppression of a circular cylinderEngin Pinar, Tahir Durhasan, Göktürk M. Ozkan, Muhammed M. Aksoy, Huseyin Akilli and Besir SahinEPJ Web Conf., 143 (2017) 02094DOI: https://doi.org/10.1051/epjconf/201714302094