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Fluid Dynamics

, Volume 53, Issue 5, pp 711–721 | Cite as

Effects of Permeable Cylinder on the Flow Structure in Deep Water

  • Bengi Gozmen SanliEmail author
  • Huseyin Akilli
Article

Abstract

Flow behaviors around permeable cylinders were investigated using Particle Image Velocimetry technique in deep water. The height of deep water and free stream velocity were kept constant as hw = 340 mm and U = 156 mm/s. To find out the effect of the permeable cylinders on the flow structure, eight different porosities (β = 0.4, 0.5, 0.6, 0.65, 0.7, 0.75, 0.8, and 0.85) were used. The results have indicated that the permeable cylinders are effective on the control of large-scale vortical structures downstream of the permeable cylinder. As the porosity increases, turbulent kinetic energy and Reynolds shear stress decrease. This means that the fluctuations in the wake region are significantly weakened by permeable cylinders. The permeable cylinders having the porosity higher than 0.6 do not pose an obstacle in the flow. Furthermore, for all diameter values of permeable cylinders, it can be concluded that the flow structures downstream of the permeable cylinder show similar trend with each other.

Keywords

PIV vortex shedding permeable cylinder deep water 

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Copyright information

© Pleiades Publishing, Inc. 2018

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringMersin University, Faculty of Engineering33343Turkey
  2. 2.Department of Mechanical EngineeringCukurova University, Faculty of Engineering and ArchitectureYüreğir, AdanaTurkey

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