Research Article
Year 2020,
, 185 - 189, 20.12.2020
Abstract
In this study, the visualization of the flow structure around a circular cylinder was investigated with dye injection experiments. The experiments were carried out in the closed-circuit open water channel in Osmaniye Korkut Ata University. Experiments have been studied on a circular cylinder at different rotational speeds. Experiments were carried out at Re = 1000 according to cylinder diameter and free stream velocity. In the study, with the increase of the rotation speed, an acceleration layer occurs between the fluid velocity in the cylinder wake in the flow direction and the flow from the circumference of the cylinder and the speed of rotation. This situation caused the complete disappearance of the vortex ruptures in the flow direction and the emergence of Kelvin Helmhotz fluctuations. As a result of the study, it is seen that the flow control is insufficient at low rotational speeds, but the flow can be controllable at high rotational speeds.
Supporting Institution
TUBİTAK
Project Number
218M357
Thanks
This study was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) within the scope of the project named TUBITAK-218M357. Thanks to TUBITAK for their support.
References
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- Akar, A., M. (2008). Vortex Control ın Side by Side Circular Cylinders in Shallow Waters. Çukurova University, Institute of Natural and Applied Sciences, Ph.D. Thesis.
- Cheng, M. (2007). Characteristics of two-dimensional flow around a rotating circular cylinder near a plane wall. Physics of Fluids 19, 063601, https://doi.org/10.1063/1.2738608
- Fallah, K., Fardad, A. A., Fattahi, E., Zadeh, N. S., Ghaderi, A. (2012). Numerical simulation of planar shear flow passing a rotating cylinder at low Reynolds numbers. Acta Mechanica, 223:221–236, DOI 10.1007/s00707-011-0561-4
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- Sengupta, T. K., Deb K., Talla, S. B. (2007). Control of flow using genetic algorithm for a circular cylinder executing rotary oscillation, Comput. Fluids, 36(3), 578–600, https://doi.org/10.1016/j.compfluid.2006.03.002.
- Pralits,J. O., Brandt,L., Giannetti, F. (2010). Instability and sensitivity of the flow around a rotating circular cylinder, J. Fluid Mech., 650: 513–536, DOI: https://doi.org/10.1017/S0022112009993764.
- Kumar, S., Lopez,C., Probst,O., Francisco,G., Askari,D., Yang, Y. (2013). Flow past a rotationally oscillating cylinder, J. Fluid Mech., 735:307–346. DOI: https://doi.org/10.1017/jfm.2013.469
Year 2020,
, 185 - 189, 20.12.2020
Abstract
Project Number
218M357
References
- Manelil, P., N., Tiwari, S. (2019). Wake characteristics of a sphere performing transverse rotary oscillations. European Journal of Mechanics- B/Fluids, 77:148-161, https://doi.org/10.1016/j.euromechflu.2019.04.009
- Akar, A., M. (2008). Vortex Control ın Side by Side Circular Cylinders in Shallow Waters. Çukurova University, Institute of Natural and Applied Sciences, Ph.D. Thesis.
- Cheng, M. (2007). Characteristics of two-dimensional flow around a rotating circular cylinder near a plane wall. Physics of Fluids 19, 063601, https://doi.org/10.1063/1.2738608
- Fallah, K., Fardad, A. A., Fattahi, E., Zadeh, N. S., Ghaderi, A. (2012). Numerical simulation of planar shear flow passing a rotating cylinder at low Reynolds numbers. Acta Mechanica, 223:221–236, DOI 10.1007/s00707-011-0561-4
- Guo, X. H., Lin, J. Z., Tu, C. X., & Wang, H. L. (2009). Flow past two rotating circular cylinders in a side-by-side arrangement. Journal of Hydrodynamics, 21(2), 143-151. DOI: 10.1016/S1001-6058(08)60131-6
- Firat, E., Ozkan, G. M., Akilli, H. (2017). PIV measurements in the near wakes of hollow cylinders with holes. Experiments in Fluids, 58(5), 39. DOI 10.1007/s00348-017-2334-x Gad-el-Hak, M., & Bushnell, D. M. (1991). Separation control: Review. Journal of Fluids Engineering, 113:5.
- Dimotakis, P., Tokumaru, P. T. (1991). Rotary oscillation control of a cylinder wake. J. Fluid Mech. 224:77-90.
- Lam, M. K. (2009). Vortex shedding flow behind a slowly rotating circular cylinder. Journal of Fluids and Structures. 25:245-262. https://doi.org/10.1016/j.jfluidstructs.2008.04.005
- Sengupta, T. K., Deb K., Talla, S. B. (2007). Control of flow using genetic algorithm for a circular cylinder executing rotary oscillation, Comput. Fluids, 36(3), 578–600, https://doi.org/10.1016/j.compfluid.2006.03.002.
- Pralits,J. O., Brandt,L., Giannetti, F. (2010). Instability and sensitivity of the flow around a rotating circular cylinder, J. Fluid Mech., 650: 513–536, DOI: https://doi.org/10.1017/S0022112009993764.
- Kumar, S., Lopez,C., Probst,O., Francisco,G., Askari,D., Yang, Y. (2013). Flow past a rotationally oscillating cylinder, J. Fluid Mech., 735:307–346. DOI: https://doi.org/10.1017/jfm.2013.469
There are 11 citations in total.
Details
| Primary Language | English |
|---|---|
| Subjects | Mechanical Engineering |
| Journal Section | Research Article |
| Authors | |
| Project Number | 218M357 |
| Publication Date | December 20, 2020 |
| Acceptance Date | September 22, 2020 |
| Published in Issue | Year 2020 |