Viscous near-wall flow in a wake of circular cylinder at moderate Reynolds numbers
- Authors: Okhotnikov D.I.1, Molochnikov V.M.2,3, Mazo A.B.1, Malyukov A.V.2, Goltsman A.E.2, Saushin I.I.2
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Affiliations:
- Kazan Federal University
- Kazan Scientific Center of RAS
- Kazan National Research Technical University named after A.N. Tupolev
- Issue: Vol 24, No 6 (2017)
- Pages: 873-882
- Section: Article
- URL: https://journals.rcsi.science/1531-8699/article/view/217162
- DOI: https://doi.org/10.1134/S0869864317060063
- ID: 217162
Cite item
Abstract
Here we present the results of experimental investigation of a cross flow around a circular cylinder mounted near the wall of a channel with rectangular cross section. The experiments were carried out in the range of Reynolds numbers corresponding to the transition to turbulence in a wake of the cylinder. Flow visualization and SIV-measurements of instantaneous velocity fields were carried out. Evolution of the flow pattern behind the cylinder and formation of the regular vortex structures were analyzed. It is shown that in the case of flow around the cylinder, there is no spiral motion of fluid from the side walls of the channel towards its symmetry plane, typical of the flow around a spanwise rib located on the channel wall. The laminar-turbulent transition in the wake of the cylinder is caused by the shear layer instability.
About the authors
D. I. Okhotnikov
Kazan Federal University
Email: vmolochnikov@mail.ru
Russian Federation, Kazan
V. M. Molochnikov
Kazan Scientific Center of RAS; Kazan National Research Technical University named after A.N. Tupolev
Author for correspondence.
Email: vmolochnikov@mail.ru
Russian Federation, Kazan; Kazan
A. B. Mazo
Kazan Federal University
Email: vmolochnikov@mail.ru
Russian Federation, Kazan
A. V. Malyukov
Kazan Scientific Center of RAS
Email: vmolochnikov@mail.ru
Russian Federation, Kazan
A. E. Goltsman
Kazan Scientific Center of RAS
Email: vmolochnikov@mail.ru
Russian Federation, Kazan
I. I. Saushin
Kazan Scientific Center of RAS
Email: vmolochnikov@mail.ru
Russian Federation, Kazan