IDEAS home Printed from https://ideas.repec.org/a/gam/jmathe/v11y2023i4p968-d1067819.html
   My bibliography  Save this article

Control of Turbulent Flow over a Circular Cylinder Using Tabs

Author

Listed:
  • Junyoung Seo

    (Department of Mechanical Engineering, Ajou University, Suwon 16499, Republic of Korea)

  • Jinhyeok Yun

    (Department of Mechanical Engineering, Ajou University, Suwon 16499, Republic of Korea)

  • Jungil Lee

    (Department of Mechanical Engineering, Ajou University, Suwon 16499, Republic of Korea)

Abstract

In this study, we investigate tabs applied to turbulent flow over a circular cylinder for the reductions of the mean drag and lift fluctuations. Tabs are small and thin passive devices attached to the upper and lower surfaces of a circular cylinder near the flow separation. The Reynolds number considered is R e = 3900, based on the free-stream velocity and cylinder diameter. Large eddy simulations are performed using a dynamic global subgrid-scale eddy-viscosity model. A parametric study is carried out to find the optimal tab configuration for minimizing the mean drag and lift fluctuations. Parameters considered are the height ( l y ) and width ( l z ) of the tabs, and spanwise spacing ( λ z ) between them. With the optimal parameters, the spanwise coherence of the vortex shedding behind the cylinder is effectively disrupted, resulting in three-dimensional vortical structures varying in the spanwise direction. As a result, the strength of the vortex shedding in the wake is successfully weakened, and the mean drag and lift fluctuations are significantly reduced by 14% and 95%, respectively, with the optimal tab configuration of l y / d = 0.2 , l z / d = 0.3 , and λ z / d = 4 , where d is the cylinder diameter.

Suggested Citation

  • Junyoung Seo & Jinhyeok Yun & Jungil Lee, 2023. "Control of Turbulent Flow over a Circular Cylinder Using Tabs," Mathematics, MDPI, vol. 11(4), pages 1-19, February.
    • Handle: RePEc:gam:jmathe:v:11:y:2023:i:4:p:968-:d:1067819
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2227-7390/11/4/968/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2227-7390/11/4/968/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Jinghua Yang & Bo Peng & Ying Zhao & Hongfu Zhang, 2023. "Wake Control of Flow Past Twin Cylinders via Small Cylinders," Mathematics, MDPI, vol. 11(10), pages 1-23, May.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jmathe:v:11:y:2023:i:4:p:968-:d:1067819. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.