Flow behavior downstream of two side-by-side circular cylinders in shallow water


AKAR M. A. , Oguz B., AKILLI H. , ŞAHİN B.

CANADIAN JOURNAL OF PHYSICS, cilt.94, ss.975-981, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 94 Konu: 10
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1139/cjp-2014-0141
  • Dergi Adı: CANADIAN JOURNAL OF PHYSICS
  • Sayfa Sayıları: ss.975-981

Özet

Investigations of bistable flow structure past a pair of cylinders positioned side-by-side in shallow water is conducted experimentally applying dye observation and the particle image velocimetry (PIV) method. For the gap ratio of G/D = 1.25, the jet-like flow between cylinders deflects asymmetrical flow structures forming a large-scale wake as well as a small-scale wake downstream of cylinders. The small vortices around the right cylinder get closer to each other forming a larger vortex in the large-scale wake region, which leads the jet-like flow to changeover side to side. The small frequency (f = 0.352 Hz) associated with frequency of vortex shedding of cylinder with wider wake and the higher frequency (f = 0.793 Hz) which depicts the smaller wakes frequency.