Flow and turbulence around an inclined pile

Soheil Farazi Majd, Oral Yagci, V. S.Ozgur Kirca, Vasileios Kitsikoudis, Elpida Lentsiou

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Citations (Scopus)


The present experimental study investigates the generated flow field in the presence of a bottom mounted cylinder with a downstream inclination. The experiments were conducted in an 18 m x 0.50 m x 0.50 m flume under steady flow conditions. A cylinder with a diameter of 7.5 cm served as a disturbance to the flow under several inclination angles, parallel to the flow direction. Specifically, 0o, 15o, 30o, 40o, and 50o inclination, with respect to the vertical, were tested separately under three different approach velocities. Instantaneous flow velocities were measured with an acoustic Doppler velocimeter, while the upstream separation distance in the cylinder proximity was visualized with the aid of a laser sheet. Results show that once the pile is inclined, the flow features change considerably. Generally, inclination renders the pile to be more hydrodynamic in shape with the suppression of the vortex shedding. At the same time, inclination makes the cross-sectional area of the pile to become elliptical, leading to an increase in the friction area and turbulence production on the cylinder boundary layer. Also, the upstream separation distance of the cylinder near the bed was significantly altered with the inclination, which would presumably affect the generation and strength of the horseshoe vortices to be generated due to this separation.

Original languageEnglish
Title of host publicationProceedings of the 26th International Ocean and Polar Engineering Conference, ISOPE 2016
EditorsAlan M. Wang, Jin S. Chung, Ted Kokkinis, Michael Muskulus
PublisherInternational Society of Offshore and Polar Engineers
Number of pages7
ISBN (Electronic)9781880653883
Publication statusPublished - 2016
Event26th Annual International Ocean and Polar Engineering Conference, ISOPE 2016 - Rhodes, Greece
Duration: 26 Jun 20161 Jul 2016

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792


Conference26th Annual International Ocean and Polar Engineering Conference, ISOPE 2016

Bibliographical note

Publisher Copyright:
© Copyright 2016 by the International Society of Offshore and Polar Engineers (ISOPE).


  • Flow visualization
  • Inclined cylinder
  • Separation distance
  • Turbulent flow
  • Vortex shedding


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